I don't plan to start using Mastodon much any time soon, but I did want to log in to post to any and all of my friends from Twitter: I deleted my Twitter account without much advance notice because the CEO of the company is a literal Nazi.
Let me say the same thing a second time: Elon Musk's ideology is indistinguishable from Nazi ideology, period, full stop. Elon Musk believes in everything that Himmler did, and I couldn't deny that fact to myself any longer.