I recently happened to take another look at an old answer of mine, and noticed that there was a fair amount of chatty comments between myself and the OP of the question I was answering.
The comments were a sidebar discussion about spoilers, and were largely unrelated to the question or answer.
I decided to delete my comments, since the conversation ended over a year ago, and then flagged the remaining comments as "obsolete", as they no longer served a purpose (nor even made sense, now that my comments they were replying to were deleted).
I was a bit surprised to see that my flag was declined.
I reviewed our meta discussion on when to use comments, and it seemed like I was using the "obsolete" flag appropriately. A more recent discussion does not seem to contradict my use of the flag, either.
Should I not have flagged the comments, or was declining my flag a mistake? If I shouldn't have flagged it, when should comments be flagged as "obsolete"?