My only beef is that this also naturally floats poor replies to great comments. It would be nice to have a good heuristic to know when to read the replies and when to move on to the next thread. I think one does exist: expandos. Give us the ability to expand and compact threads, and then automatically compact any old replies that haven't received a reasonable number of upvotes. I use the extension from hckrnews.com to give me expandos, but intelligent compaction would be so much sweeter.