Windows isn't a mobile operating system, unless you're referring to Windows phone, and from what little knowledge I have of what it's like to use an Android device, you can install custom "launchers" but you cannot change the user interface too drastically.

>Users can change the theme however they want.

Windows has extremely limited customizability compared to what is available on Android and Linux.

The key feature of both Linux and Android is that the main interface "Desktop Environment" or "Launcher" can be replaced by the user.

And they are available to use if that’s a requirement for the user.

I don’t think that every OS needs to adopt every feature of every other OS that’s out there.