Consider, perhaps, this question that attracted a late answer. I see a lot of this in the late answer queue. A mushy, inadequate question lures a new user into an answer. Is it a good answer? Only the OP could tell. This would seem to be a pretty strong indication of a 'too localized' question.
So I'm scratching my head, trying to decide what to do with the answer up for review. I could argue that it deserves to be converted to a comment, because all it does is offer a hypothesis that the OP would need to try. Downvoting seems harsh. Commenting that 'your answer doesn't actually offer a firm answer' seems a bit churlish for a question to which no answer would offer a firm answer. I'm not going to upvote, and I'm not sure that it deserves a downvote, for the same reasons. In fact, I flagged for mod as comment fodder.
I begin to wonder if 1-rep users should see a warning when they start typing answers at very old questions, just politely suggesting that 'You should only bother to answer this if you have new information to offer. If you find yourself typing 'you could try' or 'perhaps', better to move on.'