I’ve seen a few comments in the other thread about community centrization
Your following, blocking, muting, and domain-blocking lists can be imported at Settings > Import, where they can either be merged or overwritten.
Mastodon currently does not support importing posts or media due to technical limitations
https://docs.joinmastodon.org/user/moving/#export
Seems pretty similar to the way we manage it with Lemmy at the moment (settings menu, export JSON, import JSON), am I missing something?
Mastodon moves also take your following with you. You’ll still have to reimport followers, but you don’t lose your ““audience””.
There are software out there (Sharkey for microblogging (Firefish also had it but theirs was broken and leaked DMs), PixelFed for images from Instagram specifically) that allow some form of post imports, but these are only brand new posts that happen to have the same content as the old ones, and not “replacing the author of a post”.
There are work going on regarding nomadic identity and more seamless account migrations across instances, but hell will freeze over before any of the mainstream fedi software implement anything close to that, mainly due to how significant of a conceptual change that is.