During Bitcoin.review, nvk brought up the idea of a parent public key, like a xpub and we keep that super safe and use child keys. Fiatjaf wasn't liking it. There might be something there, although I don't know how NIP05s would work with that.
Discussion
He might have been complaining about the specific cryptographic technique proposed in that case; in general nostr certainly needs delegated keys. No doubt about thst.
Is there a way to have a Multisig root key like FROST that lets you delegate private keys?
I’m not really familiar with this, is it similar to NIP-41?