22
Mastodon features
(lemmy.ml)
A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy
Mastodon already has that. You can export and import ~~posts~~^[@vidarh@lemmy.world clarified below that you can only import lists, bookmarks, blocks, and mutes. Not posts.] in the settings, and under Account Settings, you can move to a different account so people are redirected to your new profile.
My screenshot doesn't show import as an option because I migrated away from this Mastodon account to Firefish.
Sadly, while you can export everything, you can't import posts in Mastodon without having direct access to the database and poking about.
You can import following lists, bookmarks, blocks and mutes, though.
Ah is that so? My mistake then.
It's stupid that it's not there, though, and I suspect it will get fixed at some point. Basically, some concerns were raised about people using it to doctor timelines (but they can already do that by setting up a single-person instance and messing with the database), and the new instance can validate the signatures of the posts anyway, so they're no less secure than posts from other accounts received via federation. If anyone is really concerned they could slap an "imported from ..." banner on old/migrated posts so people are aware they were not originally posted there.