Earlier quoted context omitted.
I actually read everything by RSS except HN, since the posts here often get better over time, thanks to comments, so they're less suitable for RSS, in my opinion. By the way, if you follow YouTube channels, not only do they still provide RSS feeds, as you can get a nice OPML file of all the channels you subscribe to: https://www.youtube.com/subscription_manager (scroll to the bottom)
I use RSS for following YouTube channels, but the only problem I have is that I have to click on each video, I'd like a RSS client to create a custom playlist, at least for all the music videos. I used to use YouTube's email notifications, but they would skip some videos randomly, and I'd be left wondering what videos I missed.
Creators sometimes do this if they publish more videos than usual, or of the video is different from their normal content.
Also when you subscribe you now also have to click the bell next to the subscribe button to get all notifications.
YouTube itself also has a built in subscription feed that lists all videos published by channels you subscribe to. It also lists the channels with an icon next to each if they have unwatched video.