Because this is the first time I see it expressed so succinctly.

“But you can’t change them” that’s a pity. With Bitcoin I can transfer my account balance to a new address (provided I still have the key). Would be cool to be able to do the same on Nostr. Old notes (from previous account) would still show as the protocol could map them to the new key and “burn” the previous one.

A long way of saying “account transfer” in Nostr would be cool if one is afraid that the nsec has been compromised.