Interestingly, I wrote a similar analysis 7 years ago. 30k visits was also what I saw! https://shkspr.mobi/blog/2012/11/whats-the-front-page-of-hac...
I had a couple of moderately popular posts in June this year. HN sent 31,588 views directly - plus associated views from apps. A post of mine in March got 36k.
I wonder if HN has reached a local maximum of readers?