I am not sure if I am echoing @psycogeek or not, but anyway, it seems that are there are least two different problems that SU has to face.

1. There are many questions on the site that are asked over and over again, and would best be dealt with by creating a canonical post that has everything these users will need and more.
2. There are many questions that are simply unanswered, and will most probably never be answered. It seems a little sad that there are 9800 ish questions that have no answers, and no foreseeable way to get any (perhaps the more relevant number is the 20,600 that have no upvoted answers). While it is obvious that many of these questions probably have no-one following them, and may in fact never be read, that does not mean that we should abandon them. After all, if people visit those pages, and there is nothing there that can help them, what is the point of keeping the page there? I doubt the user will be comforted much that someone else had the same problem, came here, and did not find an answer.

While it seems clear that the the first issue is being dealt with by this meta topic, it would be nice if the issue was also solved.