Re:Creation Myth – Xerox PARC, Apple, and the truth about in...
by yarrel on Saturday January 31, 2015 @11:10PM
(#8979133)
The Apple team added overlapping windows because they misunderstood what they'd seen at PARC.
(Source: Insanely Great, iirc.)
QuickDraw was completely awesome, whatever its inspiration.
The Alto UI was revolutionary for its time, but it was not the same as the Macintosh UI, no overlapping windows for example, regions in quickdraw being the big differentiator.
http://www.folklore.org/StoryView.py?story=I_Still_Remember_...