Those are interesting points, but I think despite the official position by dang and pg, most HN users don't downvote points they disagree with as a convention. I think this is due to the fact that a comment's karma score is not shown, which is another thing that differs from Reddit. There's no real reward or feedback for downvoting a post, and you can't know for sure if that post has -2 karma or +27 karma, so you don't really know what difference it makes. I think that's a good feature of HN, by the way.

I do think HN is much bigger now. There's less discussion on philosophy of startups in general. PG himself rarely blogs about it any more. It also seems like political topics get more frequently introduced on the front page. Also there's frequent toxicity and negativity about certain technologies which do warrant intellectual discussion, but get dog piled by naysayers. Maybe that's always been there and it's my imagination but it does seem like some of the "hacker ethos" has faded.