Definitely a one off thing case here. Last week he was on mint and now on arch with hyprland already. He doesn't upload that much so he's probably experimenting a lot.
I agree. Wish youtubers like Drew Gooden and Danny Gonzalez try linux. They have been extremely critical of modern tech and are very popular among non tech-savvy millennial audience.
It's certainly been gaining some momentum lately. Just within the past year I saw this channel coming out of nowhere with some videos about Linux, this famous animator finally getting rid of Windows and Adobe and also this guy talking about it.