Our new close reasons are so well worded that I've seen quite a few people simply copy-pasting them into the comments when the vote to close. In fact, I do it myself when I think it's appropriate.
But after the question has been put on hold, it seems like the comment becomes redundant and a candidate for an "obsolete" flag.
I flagged the "close reason" comment on this question, but it was declined:
Should we not be flagging these sorts of comments as obsolete?
(I was under the impression that the obsolete flag could be used fairly liberally, but perhaps I've misunderstood its proper usage.)
The comment has been deleted.