You can get a link to a particular comment by clicking on the timestamp next to the posters name.

May I recommend an organized note taking system copying the literal text and link for reference. I like org-roam with a hotkey to capture title and if existent any highlighted text.

https://github.com/org-roam/org-roam

There are of course about a million ways to skin this particular cat and plenty of them are good.

The benefit of using your own system is that you can trivially reference information from many websites via one method instead of relying on the many and varied features of many sites. The benefit of copying the full relevant text is both that you can search that text and if a site or a comment goes missing tomorrow or 5 years from now you aren't out the information.

Thanks for the information, and for the recommendation--I'll take a look!

There are 3 ways to save a comment within HN: comment, upvote (your list of upvoted comments is visible to you only), favorite (your list of favorited comments is publicly visible). To favorite a comment you have to visit that comment specifically (click on its timestamp).

There are of course other ways to save comments, such as bookmarking with your browser or other bookmark applications.