Windows 10 is quite tolerable for me as a gaming machine. Although, Proton is fantastic there's still a few things that "just work" on Windows in terms of gaming so I like to keep an install around.

>This lets me pick the distro that’s closest to my needs and customize anything I want to change. I’ve been using Xubuntu for years and it suits me - but there are hundreds of Linux Distro’s to choose from.

That's really what it comes down to for me, it's simply how ugly I think the interface is in terms of visuals and usability. It's difficult to describe but navigating the OS feels so painful and easy to get lost in. I'm sure it's mainly to do with me lacking familiarity with it but I've never felt that way on my Mac that I use for work.

Linux is a far cry from having the perfect window manager UX but it does have plenty of options so it's easy to find something that clicks.