@MitchW Micro.blog has done some really interesting work with Bluesky that makes it seem almost like a regular Fediverse citizen. I have an account there that gets crossposts automatically from Micro.blog. MB pulls in replies to those crossposts as native mentions and I can even reply to them from MB and it’ll put those back on Bluesky. So I never go into Bluesky or make replies with my account there, but I can still interact with people who reply to my posts there.

Facebook federating seems like a non-starter. Billions of users with posts dating back two decades? I can’t even imagine how you’d retrofit ActivityPub into that. But what do I know?