I agree with your last statement, (and actually the spirit of everything you've said and questioned here), about the continuous comparison between any GUI and (R)Windows. Many people don't realize that it wasn't Microsoft or Apple for that matter that brought GUI to computers. It was Xerox, at PARC. Xerox brought us the mouse, GUI, Ethernet, IPX/SPX, and many other technologies that so many others have taken or been given credit for. I'm at a loss why Xerox didn't sue Apple when they came out with a system that had a GUI and used a mouse; instead it was Apple, years later, suing Microsoft as if they (APPLE) had originated GUI technology on computers.
Just something to think about when associating GUI or ease of use with Microsoft. Xerox did it first, and the underlying operating system was Unix, or a Unix like operating system. From the Wikipedia.org web site:
"Xerox PARC was the incubator of many elements of modern computing. Most were included in the first personal computer, the Alto, which included many aspects of now-standard personal computer usage model:
the mouse1, computer generated color graphics, the WYSIWYG text editor, InterPress (a resolution-independent graphical page description language and the precursor to PostScript), Ethernet, and fully formed object-oriented programming in the Smalltalk programming language and integrated development environment. The laser printer was developed at the same time, as an integral part of the overall environment.
Among PARC's distinguished researchers were two Turing Award winners: Butler W. Lampson (1992) and Alan Kay (2003). The ACM Software System Award recognized the Alto system in 1984, Smalltalk in 1987, InterLisp in 1992, and Remote Procedure Call in 1994. Lampson, Kay, Bob Taylor, and Charles P. Thacker received the National Academy of Engineering's prestigious Charles Stark Draper Prize in 2004 for their work on the Alto system."