For most subreddits it is temporary blackout but some communities like one of the piracy subreddits I saw completely packed bags and the mods moved to lemmy. It's too early to say if reddit is over or if this is just a temporary setback. Reddit may even concede and revert some of their api changes to appease the populace. Simply put, we don't know enough yet.

Megadeth would have never made it either!