I think so far the most disheartening thing about Fedi/Mastodon is that I see people not want to join due to ongoing elitism.
Don't give people flack for staying on Twitter or moving to BSky, they're not our enemies.
It's fair if you disagree with those platforms and how they're run, but don't take it out on the users. They have their reasons, and being insulted for not being on Fedi/Mastodon is one of them.
Given recent circumstances, yes, staying on Twitter is an incredibly dangerous game, but not stupidity.
There's many factors that weigh into that decision, from time to convenience to reach, all of them are valid in one way or another, maybe not to you, but it's still real.
tldr;
Don't make it "Us vs Them", there is no "Them"
Be inviting to those not on Fedi/Mastodon, don't try to insult them into joining