What add-ons can do has changed over the years and have become much more sophisticated as authors have gained years of experience and savvy. We’re not 100% on a concrete solution to what this means for WoW Classic yet, but one thing we know is that we’re not going to roll all the way back to the 1.12 add-on API. Doing so would open the way for nearly complete automation of combat decision making allowing for “bot” behavior that is counter to the core WoW gameplay experience. This is one thing we know we don’t want. On the other end of the spectrum, the modern API offers some additional functionality for creating social features that could also undermine the authentic classic experience. We’re still figuring out the details and looking for a good middle ground. We’ll be keeping a close eye on feedback from the community and add-on authors on where we should be setting those boundaries. 

To fully understand the interplay, consider terrain. This includes the placement of hills and valleys, trees, buildings, and more. When hooking up the old terrain data files to the new modern game system we realized that the way the system looked at the shape of data was different. This resulted in the updated system and classic data not aligning, resulting in weird issues like Kolkar campfires underwater or burnt-out trees from the Cataclysm era appearing in the original world.
Since WoW Classic server has been announced at Blizzcon 2017, there is not much info about the server revealed. It is known that the upcoming expansion Battle for Azeroth pre-order has been available at blizzard shop, and the system requirements of Mac and Windows has been unveiled Recently, Forbes has an interview with J. Allen Brack and Jeremy Feasel about the project and some of the vision that developers have.
Preface - I haven't played WoW for any length of time since quitting at the end of WotLK. I dabbled in the next few expansions, where it seemed gold was overabundant, not sure if that's what killed the gold farmers/gold bots/sellers, but I didn't seem to see any, or even think I might have a use for them. However, with WoW Classic, I can see a market for them to come back. Did Blizz ever put something in the game to eliminate this after WotLK, or was it the gold abundance that destroyed their market. If not, I see the gold sellers and websites coming back.
Expected More That WoW Classic Will Resurrect That Hardcore Breed Of MMO That So Many Players Originally Fell In Love With. In World Of Warcraft Classic, It's Built Using Patch 1.12, Titled Drums Of War, Released On August 22, 2006, Equipment And Abilities Will Remain Stable In Order To Reflect The Minor Adjustment That Blizzard Made With Each Path While Dungeons, Raids, And PVP Features Will Constantly Change. 

Even though a modern server architecture is used, Classic servers won't have the same features that current World of Warcraft does. There won't be cross-realm servers or Looking For Raid and Dungeon Finder automatic party matchmaking. There are still a lot of questions about how the team will tackle it. This endeavor is being undertaken by an entirely separate team at Blizzard from the one working on World of Warcraft and its next expansion.[2]
A lot has happened in World of Warcraft in the fifteen years since it originally launched, and over that time we’ve come to expect certain things, not just in WoW, but in games in general. As players explore Azeroth as it existed back in 2006 during the WoW Classic beta, they’re reporting bugs – but in many cases, these ‘bugs’ are really just features that are working as intended.
In order to save up gold quickly, you must be mindful of your character’s professions. According to various sources, the most profitable profession back in the day used to be herbalism. Mining and skinning are right up there as well. Gathering-oriented professions have an advantage compared to the crafting ones in the early levels because gathering doesn’t require you to spend gold in order to make some coins. You can find plenty of herbs to collect, ores to mine and beasts to skin, all while you’re levelling. Everything you manage to gather can then be sold in the auction house fairly quickly.
Nov 15 Thank you for the demo I just want to say thank you to Blizzard for the demo. I seriously had so much fun - so much more fun than I've had trying to play wow in YEARS. I know not everything was 100% accurate to classic, but it was just a demo so that doesn't worry me too much. I still had a million times more fun playing that demo than retail in any case. THE THINGS I LOVED: (1) I died so much. Like... SO MUCH, and that's alright! Once I finally finished whatever it was I was doing, it felt really rewarding! My group and I were actually laughing when we party wiped. No one insulted anyone or pointed blame, we just had fun. (2) Things took time. The journey mattered, it wasn't just about hitting end game asap. I felt accomplished at the end of all those time consuming things I did. (3) I had fun exploring! I spent so much time just running around, not knowing what the heck to do, but that was FUN. I had FUN getting lost and finding treasure chests. (4) Seeing the classic models again! Tbh, the races all look rubbery and stupid now... I honestly think the old racial looks are nicer. (5) Reading quests was necessary again, so the story mattered to me. No one booted me from the party for "taking too long" because I wanted to read. (6) The community! There were actually people doing RP stuff and talking in character. Everyone in the chat was just having fun. (7) All of the inconveniences - running out of mana, no mounts, running slowly on foot, little or no flightpaths... These things are fun because they're not just handed to me. I had to work hard and play the game to get things. (8) People constantly buffed other players, because that small boost could be the reason you didn't die when a roaming centaur attacked you from behind. THE THINGS I WAS CONCERNED ABOUT: (1) I've heard rumors about possible sharding... PLEASE DO NOT SHARD. PLEASE. I can understand if it's temporary just for the initial launch, and only for starting zones. I think that is a decent enough compromise for the inevitable problem of overpopulation for the first few weeks. But if we're talking about full scale realm sharding, PLEASE DO NOT! Cross-realm features and sharding are what ruined communities in wow, same with dungeon finder and other such things, and these features are very unwanted for a classic player like me. (2) The elite raptor I tamed as a hunter was not stronger than the non-elite raptor I tamed at the same level. In classic, elite animals had better stats as hunter pets once tamed, compared to the same non-elite version of that animal at the same level. (3) I think the mana and health regen rates were a bit too high? I'm not certain, but if they were I honestly want them to be genuine. It's okay if it's hard - challenges make games fun! Anyway, thank you again! I had a ton of fun, and as long as classic is true to classic with all of its pros AND cons, I feel certain that it will be a success.Sarai10 Nov 15
Even though a modern server architecture is used, Classic servers won't have the same features that current World of Warcraft does. There won't be cross-realm servers or Looking For Raid and Dungeon Finder automatic party matchmaking. There are still a lot of questions about how the team will tackle it. This endeavor is being undertaken by an entirely separate team at Blizzard from the one working on World of Warcraft and its next expansion.[2]
Step-by-step class guides are on the way!  The 1-12 Mulgore Guide is the first guide to get all the individual class steps.  At the top of the guide, simply select which class you are playing and the page will dynamically update all the steps in the guide for that class (both text and images).  The rest of the guides will be slowly updated overtime to include all the class steps, but you can see how it's going to work with the 1-12 Mulgore.  I want to thank crazyK and his Placeholderguild for helping me out with the individual class content.  They are allowing me to get the 1-60 Alliance guide done while also getting all the class steps done at the same time, so everything can be ready for Classic launch (hopefully).
On August 27, veterans and newcomers will be able to relive World of Warcraft’s epic origins as they assemble a 40-player raid to take on the fiery hazards of Molten Core; fight for their faction in the ongoing world PvP struggle between Southshore and Tarren Mill; muster a realm-wide war effort to open the gates of Ahn’Qiraj; and much more. Click HERE to see the content release plan!
The Horde 12-20 (Barrens + Stonetalon Mountains) guide has been rewritten and revamped.  In addition, there has been numerous tweaks to the speedrun route to make things faster and easier to follow.  Also, in case you haven't noticed I am now adding about 40% more info per step and redoing all the images.  Unlike with my previous vanilla guides, I am now giving a brief explanation of where to go and what to do with each step along with any other helpful tips.
Through out the game, the quest log will be capped to 20 many times.  The guide makes use of maximizing the total amount of quests you can accept at once.  Because of this it is important to follow the guide exactly and only accept quests if the guide tells you to so you won't run into issues not being able to accept a quest.  If you do accept a quest that is not listed in the guide, write it down because you may need to abandon it in order to keep following the guide if your quest log is full.
Swim Speed Potions (used especially at lvl 37 for Faldir's Cove in Arathi Highlands and lvl 57 in WPL).  Try to get multiple stacks of these.  I also recommend keeping a stack of these always in your bags.  You will frequently pass rivers and lakes and can use these potions to pass them faster through out the guide.  Please note that these potions do not stack with Druid's Aquatic Form and Glyph of Aquatic Form.
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