I was a bit lazy and out of my 500 chars :)
The fedi vibe + values (culture is an overload term) will continue to exist somewhere, just like early-web, usenet, BBS vibes also still exist. But always pushed to the fringes as capitalist-induced blandness creeps in.
How many cultures still exist on X, besides toxic/fascist tribes? How many cultures exist on LinkedIn besides recruiter and platitude posters? How many on Insta, TikTok, etc.
They are there, yet things are different.