I actually favor deletion, if sufficient time has elapsed.
How big a problem are unanswered questions?How big a problem are unanswered questions?
we could probably ignore the question score and just delete anything older than 30 days that has no answers posted. This is currently about 7,000 questions, vs ~5000 with score <= 0. I haven't figured out yet how to inspect the vote scores of answers.
To me this indicates there's something fundamentally wrong with the question.