I'm trying to do my part clearing the close vote queue. Here's one with an accepted answer:
Vector addition of opposing vectors
It deserves to be closed since it shows no work. It's unlikely to be of use to anyone else. But closing it takes time (mine and that of others). Why do we bother? It has an accepted answer, so won't show up on the unanswered queue. I think trying to prune all the bad questions is a hopeless task.
I wonder too about similar questions (some with answers) that appear as "too old to migrate" when I vote to close. Could closing them be automated?