Funnily enough, right around the time I made an acct here (4+ years ago, after ~1 year of lurking), I saw an internal post by a well-known Googler talking about the recent drastic decline of HN comment quality and looking for a replacement. I still get value out of HN comments (clearly), but it's definitely changed substantially in the last few years, and not really for the better. I've resigned myself to every high-quality Internet community without heavy, opinionated moderation being a slow treadmill towards popularity and then mediocrity, or worse. Though this is of course something of a "you're not in traffic, you are traffic" problem.