What? You don't even need to understand how Mastodon works in depth to realize that sending a post to 500 different servers owned by completely different people in completely different jurisdictions is going to make it harder to delete later.

Sure -- but it also makes it harder to verify. That's my issue with Bluesky, perhaps I'm thinking like a lawyer. ATProto's most touted feature is also its biggest danger. A post on 2 servers thats hashed/verified (and perhaps admissible in court) might be more dangerous than many more rando Mastodon servers.