People keep talking about HD and multisig solutions for nostr, but what we really need is key revocation and a seamless way to forward followers to the replacement.
Discussion
Forwarding is complicated, #[4] proposal I think explains it best.
Root key with delegation and fiatjaf's proposal look good. However, to use them still requires transferring to a new key.
Using out-of-bound means, like NIP-05, to be the source of information about the new key, combined with a means to revoke a key looks like it could be an option.
I need help implementing it. It exists at https://github.com/nbd-wtf/nostr-tools/blob/nip41/nip41.ts but I need someone else to implement it elsewhere so we can compare things and clarify the spec. Then we can start using it.