Comment by account42

Email is more like physical mail - you send something to an address and whoever lives at that address gets the mail.

The described ATProto/ActivityPub behavior would be like trying keep the address tied to whoever lived there first.

Persistent identities are a nice goal but treating transient identities as persistent is not. A better designed system would use the domain name system only to look up the current identity associated with a name instead of trying to permanently tie the name to an identity.