I think people really tend to undervalue good moderation and related systems for shaping good discussion. It's extremely common on HN to see people write off all moderation as censorship and an absolute bad, but then it's really interesting to see that so many people repeatedly pick the very-moderated HN over places like 4chan. It's like fish, ignorant of water, proposing that it's universally true that decreasing the obstacles and material between each other improves the discourse, while ignoring that places like that do exist and largely lack that benefit.