That's ironic, because it means MS still knows how much people value customising their environment that they're using it as way to encourage activation and thus $$$, but at the same time they're also slowly removing such settings.
If you've ever seen Windows 11's default light theme you might understand it's really a ransom system ;).
I jest but really I think most home users just care about setting a theme and a wallpaper, nothing more, and Microsoft knows that. As technically superior as the legacy UI customization was where you could set the font, color, padding, size, etc of UI element xyz specifically most people were really only interested in clicking the theme button to turn XP from blue to silver and changing their wallpaper. The ones actually interested in putting in the work to truly customize the UI are likely a vanishingly small overlap with those that don't have a Windows license and won't pirate on top of already being a tiny minority to start with.