Braydon Fuller on Nostr: I agree. I think that "outbox" (or however it is called) is of a higher priority ...

I agree. I think that "outbox" (or however it is called) is of a higher priority right now though, so that Nostr has the character of decentralized ownership/control of notes and other stuff. So many current clients (mostly mobile) tend to push towards centralized relays. It's also, likely, a prerequisite towards solving key rotation/revocation; a revocation note is one that should not be "censored".