HN has the problem that a high-voted comment that floats to the top, that might have a whole tree of less interesting discussion under it, keeps everything else

HN has the problem that a high-voted comment that floats to the top, that might have a whole tree of less interesting discussion under it, keeps everything else stuck miles down the page. So one persons comment can effectively derail most of the people viewing the thread into a cul-de-sac of discussing one specific point.