I have two "modes" though which I use Youtube. The first is searching for the answer to a specific question such as how to change the radiator on my car or a good blueberry pie recipe. The second is I might enjoy a particular "personality" like Joe Rogan or Jimmy Dore. I don't want to subscribe to car/cooking topics. Nor do I want to subscribe to MMA, general politics, or general comedy. This new model doesn't work for me. I wonder if I will be converted eventually.
If topics were like radio stations for videos or music (i.e. genre based topics), I would use that.
I generally use YouTube as a reference book, where I look up some information. The exception is music, where I treat it more like a radio station.
But content-wise, it does not feel much different than the usual "recommended videos" section.