My comment wasn't supposed to be a flamebait.

It's an "opportunity for improvement".

Even if you Google how to map the Windows key, the solutions are not supported, or isn't exactly very natural.

The power of the Windows Run command, allows you to quickly execute a command line program, without the need to open up a command prompt. Or it allows you to open up a specific program directly, without having to navigate for it through the myriad of menus and sub-menus. Quick and easy.

Alt+F2

This is one of most annoying things about Linux. It sometimes tries to copy Windows, but instead, does a half-assed job.

Why not just use the WIN+R command? Microsoft created the Run command, and the Windows Key makes the keystroke very easy. It is certainly easier than reaching for Alt+F2.

Even Apple created their launch application using the command+spacebar keystroke.

Why can't this be made standard? Instead of having to add some other unsupported key application just to get that mapping to use the Windows Key. Practically all keyboards have the Windows key standard.