One thing I like about various of the alternative, JS-framework demo, front-ends for HN is that they highlight new comments since the last time you viewed a thr

One thing I like about various of the alternative, JS-framework demo, front-ends for HN is that they highlight new comments since the last time you viewed a thread. They probably do horrifying things with cookies or localstorage that the main site shouldn't do, but that is a really convenient feature, compared to rereading everything.