As has been mentioned in other comments, the idea that Unix was "decades ahead of any other operating system..." is debatable. For an insightful (but obviously

As has been mentioned in other comments, the idea that Unix was "decades ahead of any other operating system..." is debatable. For an insightful (but obviously biased) account of Unix's history, read the first chapter or two of "The UNIX-HATERS Handbook" (http://web.mit.edu/~simsong/www/ugh.pdf http://web.mit.edu/~simsong/www/ugh.pdf). It was written back in the early 90's by a group of academics who distinctly felt that Unix was too beholden to its late-60's origins, and its' widespread adoption has held back new developments.