This improved the "user experience" for Windows on the desktop, but put holes in the security for Windows as a server, and made the system more difficult to lock down. It's still more secure than OSX or Linux, though, by orders of magnitude.
Oh please!
And there are many flavors of Linux that fall into the same trap, only the GUI is more primitive and less functional than that of OSX or Windows (not having billions of dollars' worth of top developers behind it). The fancier the GUI, the less suitable the system is as a server.
You do know with Linux the GUI is entirely separate from the underlying OS don't you? Install server tools becomes server. Install GUI becomes desktop.