Do you guys also think that besides the fact that Blizzard will release a Classic server for public demand, they also do it as a very smart marketing strategy to get people to play Bfa and further xpacs? I mean, they're squishing the stats so the numbers are even closer to Vanilla and stuff like that. People will get bored when they see they need 3 hours to get level 10 and weeks to months to get 60 so they could just log in BfA, a more user friendly and filled with a lot more content, so even if they're old players that play for nostalgia, most of them will get bored anyway and won't have no reason not to at least try BfA before their subscription ends or they have decided to stop playing, that's what Blizzard wants, old and new players to at least give live wow a chance, hence why they make BfA the expansion with the most content of all others. Many WoW streamers also said that the majority of people that start to play Vanilla will stop playing in no time. Vanilla was the **** back then, because there were no more casual-friendly also better looking with better mechanics MMO's, like Legion is now and Bfa will be.
Here's a quick scenario: "Doodle, an old WoW player that played in Vanilla and most likely TBC too then quit the game before or after WotLK. Hears that Blizzard will release an official vanilla server so nostalgia hits him, memories with friends back then and **** like that. Starts playing 2-3 months, maybe even 4 then gets bored because he realises that it's not the same feel as it was back then, he's not into spending months getting to max level, he also realises that the graphics are out of their time right now, subconsciously comparing them to newer games and more stuff like this. But more likely the taste of WoW still remains, and even if it doesn't, he's just a few clicks away to try and see "What's all the fuss about new wow about?" and again, subconsciously comparing it to Vanilla, not only at first glance it'll seem a better game so he might as well keep playing a little more, to only find out how casual friendly the low level part of the game is compared to Vanilla, and not only."
Gaming community nowadays is not what is was back then, people don't wanna spend 3 whole months just to get to ****ing max level in a game, fun is not as it was back then, now fun is more about completing stuff, having fancy graphics and game mechanics. Hell, you have living proof here on Warmane, just compare the population of Icecrown and Lordaeron and then ask warmane what is the most profitable realm? Exactly, Icecrown. And don't forget ppl, gaming is a business too. WoW's population hasn't decreased over the years because of some expansion or something, people that started playing in Vanilla got fking bored of the game, no matter the xpac, and it hasn't increased because there wasn't anything revolutionary you could say, that attracts new people towards WoW, as it was wow in 2004 compared to other MMOs. Blizzard just has to do something that will get the peoples interest back into WoW, and they're doing it. I can guarantee you that in the middle of BfA, the population that play BfA will be double than the whole Legion's population at its peak.