A few months ago YouTube was flighting a feature I liked a lot. The homepage would group my interest into named categories "Cute dog videos", "Strangeloop", "Debussy", "PyData", "Algebraic Topology" and so on. I really liked that because I could choose which deep end to sink into. Not just that it would also serve as a reminder on what I had been interested in, but have become too distracted to remember.
They seem to have stopped this and now the recommendations featured on my homepage are all over the place.
Same. It was refreshing to see options for computer science, electrical engineering, etc... instead of the usual stuff. Found a few new channels the day or so that feature was up.
Unfortunately, I don't think there's any (public?) way to force it. I've seen the feature disappear or reappear on a reload -- it's not consistent across a session, let alone on a user-by-user basis.
Try refreshing the home page until it shows up, maybe?
At youtube.com/new, they say you can opt-in to experiments if you have premium, but I don't have premium and am not sure if that is one of the options.
They seem to have stopped this and now the recommendations featured on my homepage are all over the place.