I've been playing WoW since Christmas '04. I was there for every major in-game event in WoW history. Mentioning this isn't an attempt to flex as much as its about countering halfwits who claim that experience > logical arguments. (Experience isn't more valid than logic, BTW.) So to preempt that bullshit, know that I've probably had more experience with WoW at every stage in the past than any given critic.
BfA may not have done everything perfectly, but the WoW you can log into today is LIGHT YEARS ahead of Classic in just about every single aspect you can possibly image. The people who "remember" how great Classic WoW was are in reality remembering their experiences (not the gameplay itself) and how much they enjoyed WoW back in the day. In an effort to recapture the joy of the old days, they think all that must be done is to recreate the game they enjoyed. But they're not understanding that it wasn't about the quality of the game, rather it was about the sense of wonder and excitment for something new (and great! for its time) and their own ability to enjoy things back then vs now.
If all the years of improvements and the cumulative content could be magically added to Classic WoW - and we in our teenage years could have had access to the whole of WoW as it is now, instead of what it was back then - our enjoyment and memories of the game would almost certainly be even deeper, stronger, and more varied. And we'd never go back to some half-baked, pre-learning experience WoW classic. It would be taking away a myriad of features that make WoW a great game, and once nostalgia is removed from the picture, it doesn't make sense.
Its a WoW stripped of most - if not all - of what makes today's WoW so good. It's a barebones WoW that is deeply flawed, but was **so good for its time** that it barely mattered. WoW grew up along with us; that doesn't mean you can recapture the halcion days of the past by removing all the progression WoW has made, any more than you can recapture the joy and memories of your teenage years by trying to re-enroll in high school & droppin your current job in favor of part time McDonalds and moving out of your house to live with your parents again.
Some people have to experience the disappointment for themselves before they can accept the reality of the situation.
That, or because they prefer the vastly simplified systems and hardcore-rewarding emphasis of Classic WoW.
WoW Classic had virtually no endgame, it was just that everything took far, far longer to complete.
I for one can't wait to see the bitching and moaning on the forums pertaining to how Classic WoW "isn't really classic" i.e. has been changed in some way.
Nah, what changed the game was your memories. Full stop.