Even if we look at specific examples, say randomly selected comment chains about popular XYZ topic.
Then comparing June of 2026 to June of 2023, it does not yield any noticeable gains. It’s at best flat or even a bit of a downward trend in credibility, level of detail, and so on.
Let's take it at face value that you objectively measured productivity somehow, measured credibility, post detail and even volume. Why do you even feel there is or should be a casual relationship in either direction between hacker news participation and productivity?