> Anil also mentions migrating from Mastodon, which has a similar problem: migration is a form of redirect, so the platform you’re migrating from has to continu

> Anil also mentions migrating from Mastodon, which has a similar problem: migration is a form of redirect, so the platform you’re migrating from has to continue to exist and not block your migration. FWIW, when migrating from Mastodon instance to another, as long as both instances are online and in agreement during the migration, the ActivityPub protocol will automatically update any followers to use your new instance. The old instance could go down the next day and you wouldn't loose anyone. However, the posts remain at the old platform - so they disappear if the old instance goes down. And, of course, any hyperlinks pointing to the old instance will stop working when it goes down.