I responded to a story-id question with a comment suggesting that it's a duplicate. Several years went by with no word from the OP, and the question was still unanswered, so I decided to post an answer rather than leave it dangling as another unanswered question.
In such a case, should I duplicate the information (plot summaries, excerpts, etc.) from an old answer, or is it enough to just name the story and link to an old answer for further information? The reasons given for deprecating link-only answers don't seem applicable when the links are to this very site, but what do I know?