thanks @DeanMarkTaylor but this is a bit of a different use-case, but I see (& like) your thinking
I know the ‘solved’ plugin, but had not tested whether it was possible to convert the specific ‘solved’ post into a wiki that could then be the reference response to any thread. Have you tried this yet?
Of course even this solution would require you to make all categories where you might add wikis have “accepted answers” and that would be OTT if the threads were almost always conversational rather than Q&A