Not when the instance you are on is banned or otherwise disappears and you use your exported data to "revive" your account on a different instance (with a different handle), which is the scenario I proposed above.

The only way to avoid that is to stand up your own instance. And that is the great thing about decentralized systems. Because you as a user have no visibility into the systems, finances, nor management of any of these platforms.

I still blog on a server I rent but the backup is hosted in a server in my closet. I’m fully aware that rental can go away any time. And that’s been the case for decades.

Maybe it’s a generational thing but it appears people assume these platforms owe them something. The TOS makes it clear they owe them very little. So you can be muted, banned or deleted at any moment.

I’ve watched many social networks disappear and end up in the footnotes of a Wikipedia article. Nothing about the internet is guaranteed nor permanent. Twitter nor Mastodon owe you anything.

I'm on my own Mastodon instance but should it get banned I'd pretty much lose my followers. I think that was the original point. Otherwise agreed, neither Twitter nor Mastodon owe me anything.

If you get banned on Twitter or any other centralized service, you lose all your followers. If you get banned on Mastodon, you lose your followers on the instance(s) that banned you.

But generally it takes a lot to get banned by most fediverse instances. You basically either need to be a nazi or consort with nazis.

There are, of course, instances that would ban you for less than that, but these tend to be much smaller and trying to foster a very specific type of community. If they'd ban you, they probably wouldn't follow you either.

If it disappears, you're right. If it's "banned" (not a thing, assuming you mean defederated) then you can't move to one of the instances which have defederated it. Any followers from an instance which has defederated yours will also be lost, not because you can't move them but because the block on their instance will automatically cause them to unfollow you.

The solution to this is to move to an instance which hasn't defederated from the one you're on. Worst case, setting up your own.