The interesting thing about this whole NIP-37 (editable notes) saga is it's only a draft. it isn't officially part of the protocol yet. Yet it is fully implemented by the author in his client according to his specification. Despite there being competing specs for the same NIP in the works from the Coracle dev (links are on the bottom)
From the discussion I read, it looks like most of the contributors like the Coracles better than the one implemented by Amethyst.
So what now?
nostr:note1a8m8wxjxx0l6qkqfyjqzw0uhjwxxr0zutxjqex6wspw8kdp49c0s5a7tv7
In fairness, it will be optional. Clients don't have to implement it.
Amethyst spec: https://github.com/nostr-protocol/nips/pull/1090/files
Coracle spec: https://github.com/nostr-protocol/nips/pull/1091/files