I know it's still dumb, but in that screenshot they are not using Chat anywhere as a proper noun. The option to get to this screen is no longer Chat settings it's RCA settings. Conversations it says RCS message instead of Chat.
I don't like the idea that my YouTube premium money just goes into a big pool that's divided among all creators whether I watched them or not. I block ads and subscribe to patreons of YouTubers I watch the most, I would probably pay a few dollars for YouTube premium.
It tells you at the bottom what backend you're using