>I would just have 1 improvement for HN: add category tags to each post.

A lot of times I wish it had the equivalent of subreddits, but then I remember that's sorta why reddit sucks.

This is a genuinely good idea, it also seems fairly simple to implement.

To keep it simple, it has to be up to the poster to pick category tags.

My yearning for the "good ol days" got me thinking of repurposing HN as a Usenet clone. New HN posts would be categorized into one of the old Usenet newsgroups via AI. You'd only see posts for your subscribed newsgroups.

Add some keyboard navigation - spacebar for the win - and maybe tweak the UI for a more monochrome monitor vibe.

Something like this?

https://news.ycombinator.com/item?id=35904988

Tags could work very well to filter, they could also sub-divide the audience and attention too much unintentionally.