HN is only this way because of a focus on moderation to keep the place of going off the rails. HN itself has one of the best moderators I've seen that's been able to keep out of petty arguments that tend to infect and ruin forums. It's not something easily scalable at all.

Part of the problem with being on a site like HN is we see everyone here bitching and groaning about how much 'big web' sucks and how we should get away with it, while missing that most of us here are also visiting that same big web with a few billion other people every day. I'll believe twitter/FB/etc is dying when I watch them turn off their servers for the last time.

HN is already way larger than that. There is nobody on HN who knows everybody else either by nickname or IRL or any combination. It's 'mostly anonymous' with 'mostly people I don't know or recognize at all'.