The Sims expansions aren’t comparable to WoW expansions - Sims exp are optional addons while WoW exp reinvent the entire game over and over again and aren’t optional.

It’s crazy to me that WoW exists but I think there won’t be a WoW 2. But who knows i was wrong about this with StarCraft as well and StarCraft 2 has turned out OK

I’m not even talking about WoW expansions. The game has been so thoroughly modified and improved over the years it is simply not the same game it was at the start, though it retains many familiar elements. Is is essentially a sequel in all but name.

Anything they would add in a sequel is just added to the existing game.