Strict moderation is the reason HN is the only reasonable discussion forum remaining on the internet. I wish good moderation was a skill that more people learned - would you ever be interested in writing a guide or teaching a class on moderation?
Don't you find it a bit suspicious that the forum you happen to like is "the only reasonable discussion forum remaining on the internet"?
You may also like Lobste.rs https://lobste.rs/
Overall it is a lot better. The topics, timeline, moderation, structure and even comments. And a think some people might enjoy that.
But it also sort of highlights the greater problem which is that most people who frequent these forums these days just aren't that interesting, or interested. Or it is at least hard for those who are to show that and get something out of it.