There's one main thing I like about #BlueSky, #Nostr, #Cwtch, and the in-development P2P-ified #Matrix over #ActivityPub and Matrix as they're generally deployed now: your ID doesn't depend on DNS.

I've not been in the Fediverse very long, but I've already seen people lose their entire social graph because an admin unilaterally took down an instance. When you tie your identity to DNS, you're at the mercy of the domain owner and every point of control over the DNS as a whole, including the court systems in every authoritarian jurisdiction. Not your keys, not your identity.

I like the admins of my instance here, but I see the toll it takes on them running it even with the community's contributions. It's a lot of pressure and a lot of power to have that much control over identity and trust for your users.

I don't think we have to wholesale move to other protocols, though. The beauty of open networks is the freedom to build bridges. When people do migrate between them, it can and should be as smooth as migrating between ActivityPub instances in the happy path, and remain fully interoperable.