One thing I really miss in HN is having a tagging system to filter content better. Sometimes, the things I want to follow or ignore don't have any clear hints in their titles. Having tags would really help customize the content for each user.
That's an anti-goal of HN; everybody shares the same front page here.
https://lobste.rs/ has a tag system. I asked some months ago why HN doesn't. The answer was that it adds complexity and is hard to remove if not worth it. They want to protect HN's minimalism.