These questions have upvoted answers so they'd never automatically be deleted; this has to be handled manually.
(We have provisions for removing old 0 vote and negatively voted questions that have no significant activity over time, but that always precludes an actual answer.)
Thus I think the thing to do is what you are doing now, bring it up here.
The general philosophy of closing questions is that closure is a step on the road to eventual deletion; the main exception is duplicates where the other questions are needed as differently worded signposts to the eventual answer.
As for what should be eventually deleted, the criteria is simple:
Does the existence of this page make the internet better or worse?
Though I would also add
Does this existence of this question actively work against the charter of this Q&A site?
... as well.