I wonder where all the artists who used to make the wide range of styles for XP went after MS made it harder to apply themes to windows, or what factors contributed to attracting artists to start making that kind of customization. I think partially it's down to the platform many use (many seek to theme mobile OSes), but the tools to do so has to be a large contribution. I'm not aware of anything like Stardock's Skin studio that exists outside windows, and from looking at their website it's now useless for anything past win10 1909. Having their art seen on widely used platforms (OS or applications) has to be a large draw to it as well.