I think that is bad too, accepting the fact that things don't change is probably the best way, but seems much simpler to implement and not very harmful to clients that don't implement it.
Probably the most honest UI, if you want, would be to have a "nuke" button that tries to delete everything, but decouple that action from the act of creating a new note. Let people manually delete and then make a new one.
+1 for decoupling. You can "delete", and then post a new one.
Clients following the delete request can choose how to display it in the UI.
In all other clients, it would be cool if it just looks like a quote tweet of the old note.
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Benefit of quoting each of the edited versions - you can wee what engagement/comments were there with the specific previous versions of the note.
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UX-wise, in terms of other users experience (who might have responded/boosted/quoted) your old note - I don't see any clean way how to allow edit without actually NOT hiding the previous versions.
post nsec to kill account
