I've been on HN a long time and the comments have always been my favorite part, but recently it seems like the comments have skewed far more cynical or negative.
Yesterday's post where the indie hacker was making 45k a month is a good example. So many comments deriding his businesses, his revenue, or suggesting he was lying (???).
Have things changed or do I remember the past with rosy glasses?
Anything that expresses a non-mainstream opinion might hit the initial downvote limit, but recover over time if it turns out to have some merit. (My fascination with capability based security falls into this niche)
Something non-obvious, but informative, tends to get a bit of upvoting.
The rare really good point that builds discussions... those get rewarded richly.
So, the moderation system, as near as I can tell, works as intended. The feedback cycle takes a while to train us for better behavior, but it seems to work.
You do have to weigh all of the above, against the factors that overcome inertia, and lead to someone posting.
Most people reading are likely to see something expressed at least as good as they would, and thus just lurk.
It's only when you've got a nit to pick, or an interesting tangent, or need to self-promote, that people tend to post. These are the forces always pushing against moderation.