Because they love racism.

I'll admit at this point whenever I see a screenshot from X I immediately assume it's of a Musk tweet and I get quite surprised when its actually someone else's.

Either racism/Nazism or network effect. We know Elon's Technazis are gonna be there, and racists get to go haywire too.

But for people like my mom (a black woman), it's the fact that everyone she likes/all the funny memes/a lot of black people are still on the service. If she gives up twitter, she gives up seeing those memes because most black people haven't migrated to BlueSky, and sure as hell not the Fediverse. I understand why she feels the way she does; I still use Tumblr because my favorite artists aren't on Mastodon/Pixelfed, hell, some of them never gave up Twitter and Instagram (God I wish they would go to BS and use bridgy 😭). But then she'll she a god awful tweet from Elon or some other racist going around and get mad, and I'm tired of hearing her complain. And then I always tell her, "why are you surprised, you're on Twitter. Just leave," but then I get the network effect issue.

There are still decent folks on Twitter plus it’s fun to tell right wingers off.