Does anyone still use Greasemonkey? I created a small little script[1] a while back. It's not nearly as sophisticated as the HN Enhancement Suite plugin, but it adds some nice features. It previously added comment collapsing, but I disabled it since it's now a permanent feature.
Yeah, I use Tampermonkey on Chrome, which is essentially the same thing--not sure how big the community is, but it's not no-one. (For a long time, you could just use Greasemonkey scripts natively as extensions on Chrome, but they nixed that when they decided all extensions need to be on the Play Store, iirc.)
[1] https://bitbucket.org/robmass94/hacker-news-enhancements/src