Scenario: User asks question. Answers given (or not) and are voted on (or not) but not accepted. User proposes answer or workaround in their own question (either as part of the original post, or in subsequent edits) rather than in an answer with a self-accept.
Would it be desirable or useful for those of some level of reputation to have the ability to extract the answer out of the question, place it into an answer, and then mark it as "accepted answer"? Note, I do not mean make this the job of a moderator.
Perhaps this could be allowed with author permission, or after a time period (rep of X + time of Y).