Toshley on 24. Dec. 2017.
Didn't Blizzard already talk about how they are going to recreate vanilla WoW using their current tech? I think there are a bunch of technical problems when it comes to just releasing an old patch version of the game, at least on their end when it comes to updating and maintaining it. I imagine they are using a whole new suite of software since the Vanilla days. Not to mention the graphics quality has come a long way since the early days, not just model quality, but things like texture resolution and lighting effects.
Plus they are really worried that players don't really understand what they are asking for. There is a lot of nostalgia for the days when everything was new and exciting, you didn't mind spending a week or two in Stranglethorn, because it's so massive it took that long to explore, and getting to level 30 took so long that it would be a long time before you had to do it again.
These days, we've all run through it so many times, imagine having to spend 2 hours on a singl