First and foremost any EOL question considered "answered" (has one or many +1 or higher answers, regardless of accepted) should be ignored. If you have to vote, I'd vote to leave-open. It's been dealt with, stop wasting review time.
I'd frankly take the same tack with unanswered questions. Unless they're a high scoring question they'll be cleared away automatically. If they are a high ranked question:
- If the question would technically still apply, you could edit out the version specificity.
- If the OP hasn't answered questions you could vote as unclear.
- If it has a good answer that hasn't got a vote, +1 it and move on.
- If it's super-version-specific and has no positive answers, close-EOL it.
But in all seriousness, almost any time spent on old questions is wasted time. We have questions coming in that aren't being dealt with so people would do best to hang out on the new questions page. The system will deal with the ancient cruft in its own time.