I wouldn't mind diversity, but in this particular case, Simon has been consistently documenting, exploring, and commenting upon AI advancements. As far as I can tell, nobody has attempted to keep up with his pace, aside from maybe Zvi, whose writings are much less compatible with the HN audience at large.
That is to say, I don't think this is a consumption issue - it's a production issue.
Personally I've been wanting to blog more about new AI trends but at the rate AI trends are evolving it's unexpectedly hard to keep up while also having a full-time job while still maintaining good writing quality. The few blog posts I've written about this year have only because there has been significant overlap with my work for my full-time job.
Also, with social media becoming increasingly broken, the distribution of non-hype AI blog posts is entirely dead outside of the coin flip of getting the post to the top of Hacker News, which is less rewarding. It's a chicken-and-egg problem.