>>505972739They built it in the sewers in the last couple of years. It's only been a few years since the events on WC3 actually. In fact, every capital in the game has been either constructed or rebuilt after destruction in the last 5 years, with the exception of Ironforge.
Yes, that's why the Deadmines and Defias plot lines are like that. Including Onyxia and the absence of the king.
Yes, Undercity looks like scourge architecture. No, the Foreskin aren't scourge.
Yes, Darnassus AND Teldrassil were raised from scratch in the last 5 years. No, those visibly aged buildings in Darnassus aren't centuries or even decades old.
No, it really doesn't make sense.
WoW being developed alongside WC3 is part of the reason why it doesn't make sense, but it's also a lot of Blizzard not really thinking stuff out during development, and then sticking to it after retconning certain things during development.