The goal on HN is curious conversation. Curiosity likes diffs [1], not generics [2, 3]. Try to comment in a way that leads to a new place rather than an old place.
The easiest way to do this is to respond to the specific new information in an article. As a nudge in that direction, I've swapped a different interrogative pronoun into the title, and have downweighted the generic subthreads which were rising to the top like bloated balloons and crowding out more interesting discussion (as typically happens in these cases).
You don't only have to react to the specific new information in an article. Whimsical tangents and reactions are also ok. Just ask yourself if it's expected or unexpected [4], and prefer the unexpected.
https://news.ycombinator.com/newsguidelines.html
[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...
[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
[3] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
[4] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...