Mostly 'cos I was trying to track whether the surfeit of AI stuff was real or my imagination - when I did it I was consistently getting four to eight AI stories per front page view. Right now there's only one. The categorisation is very loosey goosey, but I think it's reflecting something real there.
More details on the logic: https://paperstack.com/hntags/
I'm currently on a delightful honeymoon with my wife (6 years after the wedding because of covid and procrastination), but when I get back I intend to add some tracking of category stats over time as well as in-the-moment.