Above this, I have a slightly different concern. I get all mine sent by email, but I know others use the inbox exclusively.

If you remove the original comment, then you don't know what was originally said. I've seen some people put extra info in an initial comment then edit it out knowing I'd get it, or some people completely change the tone of a comment &c.

If this was combined with a 'minor edit' box, so minor edits get this, but non minor ones get both, it'd work for me.

But ultimately, "I have no opinion" because it's a feature I don't use, I just delete all comments on a regular basis.