If you or someone else has an archive of your data, then you can seamlessly port your account somewhere else. With Mastodon, I'm not sure there's an established

If you or someone else has an archive of your data, then you can seamlessly port your account somewhere else. With Mastodon, I'm not sure there's an established flow for downloading your full account data, and you have to have your old server cooperate and redirect your user page to your page on your new server.