Comment by unknownzero

It's worth noting amidst all the debate about whether it's feasible or worthwhile to offer older versions of the game as server options, blizzard has already done this for a long time with Diablo 2. You could (can still) choose to play classic or expansion on the legit battle net servers, and both had ( possibly still have ) vibrant communities. So it's not like this would be particularly novel as an idea to them, I'm surprised they haven't done it with wow already.