What did youtube do?
You won’t get video recommendations on your home feed (and maybe also other parts of youtube) if you have watch history disabled in your google account settings (you request google not to save your watch history).
I am subscribed to over 100 channels, ranging from daily uploads to 1 video every few months. Frankly I don’t need more stuff to watch. When I do want to find something new, it’s either a recommendation from a friend, something I saw on a different social media, or something I searched for myself deliberately.
This change isn’t a good thing, it’s Google trying to pressure more people into giving up more data, but the “threat” of them removing their algorithmically recommended content from my feed is not a threat at all, it’s a bonus if anything.