The article itself was a bit disappointing because it focused on political issues. In my opinion the strength of HN in this regard is that it is both a "sjw cesspool" and a "haven for alt-right", as evidenced by the fact that a comment on a controversial topic can easily float near zero points while raking in both upvotes and downvotes. And even those who refer to it as "the orange site" still come back and comment. In other words, HN may be an echo chamber but it is a pretty big one with a lot of voices in it.
both and neither. Partisan discussions, or even any kind of bitching at all ... are outright discouraged. I often step out of line in this regard and don't always agree, but I'm also confident that folk on "the other side" face the same kind of treatment. Though frustrating at times, I respect that it keeps things clean and helps cut out a lot of nonsense, of which the Internet has no shortage should I feel the need to go find some.
EDIT - actually upon some reflection I think that I would have to respectfully disagree, and change my opening sentence here to just "neither". Extremes of opinion that are "off topic" are not tolerated, and this is a good thing.
In one sense it's a shame when thoughtful, evidence-based discussion is discouraged for being off-topic. But I suspect that's ultimately what makes those discussions possible; they're happening between relatively small numbers of discussants, in a space that doesn't draw in people looking for political debates.
How often do you hear "I didn't know that, and it's a good point" in political discussion? When hypothetically, there's no reason you should hear it less frequently than in scientific discussions.
One of the great casualties of modern political debate is that citizens mimic professional politicians, in that the sole mode of discourse is argumentative.
When in reality, if I'm faffing about on HN I would much rather learn something than "win."
It's not like dang steps in at the end of every debate to award the winner a gold trophy.