Lots of talk of twitter possibly shutting down as early as tonight & people saying "Elon Musk could have ended world poverty and hunger but he spent $44b to wreck twitter". The worst thing would not be the loss of ability to communicate 1-to-1, but the communities that have been formed. I'm still not quite sure how Mastodon works - what is "local timeline" and "federated timeline"? Both seem spammy and random - local seems to be people just on my server, but federated is what? Everyone ever?!