I quit when pandas started roaming Azeroth. What was Bliz even thinking?
But after that I went to a private server to try older expansions and it was a lot of fun at first but the experience became altogether corrosive.
These days I really enjoy Path of Exile, but it would have no use for Curse apart from the wiki for reading content about the game.
Having a company thrive from curating game information frees up game developers to put their time in the game itself and leave the understanding of mechanics to a third party.
This is a double edged sword I think. It would be better for games companies to do it themselves, however the promotion of the game then also gets spearheaded by the third parties to drive their interests further.