It is very common to have sections of comment threads that become moot after a post has been edited. For example,
When you bind
clickto a selection in jQuery, it does not also bind it to future elements that match that selection. You should use the
delegatemethod to automatically bind to dynamically created elements. The
livemethod used to be used for this purpose, but it was deprecated in jQuery 1.7.
livemethod was deprecated in jQuery 1.7, use the
delegatemethod instead. --Commenter
Oh, I didn't know that, thanks! I've edited my answer accordingly. --OP
The answerer edited his answer according to a comment somebody made, which makes the comments moot and thus no longer helpful.
Unfortunately, these comments usually won't be deleted, because if one person deletes his comment, it removes the context for the other comment and makes it confusing.
There should be some way to alleviate this problem. I don't know what sort of thing would work well to ensure that moot comments are deleted, so this question is tagged discussion rather than feature-request.