Hannah Montana Linux is probably the most popular Linux distro.
In all seriousness, popularity isn’t necessarily the best metric for what you should run on your computer. Ubuntu might be fairly popular, but it also isn’t particularly good.
It’s a bit of a weird setup, and not at all practical. I build “golden images” with archiso, the image gets sent over, then local disks are auto-mounted. The local disks have my ~/home, so all my configs, flatpaks, games, etc. stay consistent.
I use PXE for my servers, so I figured “why not?”. I don’t do too much on it besides videogames, I do most real stuff on laptops. This “setup” probably isn’t going to stay around forever.