To clarify, PopOS is building COSMIC as their DE, which will probably someday be awesome. But it isn't what I'd use today unless I wanted to play around with buggy beta software. I certainly wouldn't choose it as my first serious option for my millions of followers to see. I'd choose something that's more stable, well known, and reliable. But that would probably be a boring video since it's been made a million times at this point. And I think he probably knows that.