This week, I went over to Bluesky and asked people who'd left Mastodon why they left, and lots of people told me. I grabbed the replies and crunched them and wrote up a summary. I think it's really interesting and often kind of wrenching.
https://erinkissane.com/mastodon-is-easy-and-fun-except-when-it-isnt
@kissane great work, thank you for doing that!