I've noticed a significant tone and demographic shift on the site over the past 2-3 years with more Western Europeans and Midwesterners and fewer Bay Area+NYC users, and fewer decisionmakers or decisionmaking adjacent people using the site.
And the deeply technical types who used HN largely shifted to lobste.rs.
Karrot_Kream (another longtime HN user) identified this shift as well [0]
There's also a tension between the increasing "community building" happening on HN and the Bay Area/NYC crowd. A lot of them have an extant community largely based on in-person relationships. The more HN builds its own community, the more you alienate this set of people. In other words, Slashdotification is happening more and more to HN where a set of very online tech people who don't really make decisions generate most of the chatter on this site.
The reality is, most people are in-person now and conversations that were happening on HN because of the pandemic are now being done offline.
Blind is toxic, but at least the users are cynically realistic.