[omeze]

The point here is that self-hosting is _possible_. Most users are almost certainly going to just let a third party host their keys. But if keys are identity primitive at the protocol level, then the protocol prevents full centralized platform capture, similar to email interop.

[grishka]

The key being the identity still has the problem of not being changeable, no matter how you spin it.

Self-hosting is possible with ActivityPub as well, but without sacrificing the user-friendliness. I can already see someone saying "what do you mean I have to start a new account after my private key leaked".