Why would this be the end of HN? HN does not have communities, its algorithm is good at supporting diverse content, and the moderators are good at keeping discussion civil.
On Reddit, the norm is often making jokes in the comments whereas here on HN ideally we're sticking to the topic at hand or posting some anecdotes related to it. Jokes just worsen the signal:noise ratio here.
Imagine reading RFC discussions but needing to skip every 3rd comment because it's just a pun.
https://en.wikipedia.org/wiki/Eternal_September