Fedora KDE on the framwork laptop. Not the only one here it seems. My pc still runs Windows 10 but I'll change that once I have the time.
Fedora is cool because it is about as user friendly to beginners as Ubuntu, without Canonicals shenanigans. It's a freedom respecting community project and always pretty up to date. I like the quick release cycle. It seems like a good balance between a rolling release and slow fixed releases. Upgrading to the next version takes no effort. And KDE is just cool for it's customizability.
I used Ubuntu years ago and left after trying 11.04 (has it been that long?) because the new Unity desktop environment was awful and buggy and the release generally didn't work even after I switched desktop environments. Rightly or wrongly, I came to associate Canonical with buggy bloatware.
I like how reliable Debian is for my servers but the package versions are too old for a desktop. Even then, a few days ago, I had to install rust with curl | sh because Debian's package was just too old to build what I needed it to.
I distro-hopped a lot trying to replace what I used to like about Ubuntu on the desktop. Fedora has survived many reinstalls now. Like you say, it's on the cutting-edge but it also doesn't cause major issues most of the time. They're also pretty predictable and don't try anything insane.