Posting this under the heading it deserves: I joined for one answer and stayed for a year — what changed my mind Everything below is what sits behind that.
Question in the title and the context underneath, in the order the how-to-ask page suggests.
What I have read: the maintained document, the two topics it links, and the tag page. What I could not find is my specific case, which may simply mean it is uncommon.
Happy to be pointed at an existing answer if there is one.