Yes, there is definitely potential for a deterministic KDF such as a an HD Wallet.  The current spec is only a first draft.  We can and should add a paragraph on subkey derivation.

melvincarvalho

nostr

Could Nostr Subkeys Replace GPG? A Simpl, Powerful Alternativ for the Modern Web

0xbitcoiner

I mentioned it to @melvincarvalho on nostr, but I’ve always wondered if it might make more sense to use HD keys and just provide derivation proofs when needed.

Publishing and finding more notes seems to have more moving parts than necessary.