[bradleyjg]

There's a third party implementation of that (https://github.com/jaekwon/HNCollapse), but I that doesn't really help a commenting culture that is shaped by not having it built in. HN commenting threads are winner take all with respect to the top level comments. Once one gets entrenched the others die on the vine. To a lesser extent the same thing happens at subsidiary branches as well. It makes for a very unbalanced tree.

[prawn]

HN Collapse is an absolute must and should be implemented by default, IMO. Whenever I'm on a machine/tablet without it, my reading experience is much poorer.

[positr0n]

When I'm on a phone or tablet I use http://ihackernews.com, which has comment collapsing.

[jaekwon]

hah, I forgot about this thing. does it still work? :)

[Wingman4l7]

There's a Firefox extension that does[1], I believe there is a Chrome one as well, and there used to be other bookmarklet(s) that worked too.

[1]: https://addons.mozilla.org/en-us/firefox/addon/hn-utility-su...