I agree that Super Mario 64 particularly hasn’t aged, wouldn’t it be great if Nintendo made a modern tripple a continuation of a game like Super Mario 64 with a better camera and better controls? They wouldn’t even have to call it Super Mario 64 2, call it something else, but make the colors similar, but more next gen to that. Improve the polygon resolution, make the textures better quality. It’s really not that hard, it’s a game that Mario desperately needs but Nintendo hasn’t done properly for the franchise.
I think a lot of it has to do with the fact that the people running Nintendo going form the N64 to the Gamecube had changed but the Mario creator was there (I atleast think he was) to work on Mario Sunshine, I don’t get how they went from Super Mario 64 to Sunshine regarding the game mechanics such as the water flood.