That's a great idea -- I wish more people would do that (edit the original post with the answer). It helps a lot in navigating the noise of a thread.

I've often wished that threads could have a "history" section where the back & forth of "try this" "didn't work" "oops try that" could get archived, perhaps by the person who created the thread). People viewing the thread could get to the history, but it wouldn't be what you see by default.