YouTube recommendations used to be quite good for a brief amount of time when google brain originally took over it I think? Now it’s a mess but it’s clearly due to exec meddling. like their absolutely product destroying migration towards videos 8 minutes or longer; most original content is now fully shit because they are filling it up with garbage to pad the time and release in a cadence. All stupid rules imposed by YouTube, which just takes creativity out of people.

It’s also possible any recommendation system can only stay pure for a few years until everyone from both sides is gaming them so badly for money it just cannot work anymore.