Speaking of Windows and PC Magazine, there is an article that
traces the last Twenty
Years of Windows. In it, the author says:
When Interface Manager [i.e. Windows] was first announced,
Microsoft described it as an option that would work on top of all
the company’s operating systems, including DOS and Xenix,
Microsoft’s version of Unix.
Imagine what a different world this would be if Windows ran on
Linux/Unix. MS could call it Windows Vista for Unix/Linux Edition
and sell it for $50. Now, that I would buy.