It's the community moderation that keeps HN resilient, i.e. many-humans-in-the-loop
That fell apart quickly due to sheer scale that AI operates at. Elsewhere in the thread a commenter mentioned a significant increase in Show HN. It is impossible to keep up. I wonder when HN will go down due to scaling issues.
Someone suggested earlier this week that an invite system should be implemented (I think lobsters has it?) I doubt it would fly here, but yeah.