Late reply, but I was speaking in generalities. HN doesn't quite fit the bill for a general forum that would improve from those tactics. There is a somewhat focused expectation of submissions, and the comments typically need a certain caliber of quality. Forums like this that deviate from those core tenets converge on being a Reddit clone with fewer users and features.
It's natural for users to engage less and less over time. However, holding the community to a certain standard keeps users from outgrowing the submissions and discussions. No one is too old, too mature, or too "smart" for earnest discussion.
It's natural for users to engage less and less over time. However, holding the community to a certain standard keeps users from outgrowing the submissions and discussions. No one is too old, too mature, or too "smart" for earnest discussion.