Bill Atkinson did the same thing with some of QuickDraw's overlapping region code on the original Macintosh. He perceived that the Xerox Alto was doing things t

Bill Atkinson did the same thing with some of QuickDraw's overlapping region code on the original Macintosh. He perceived that the Xerox Alto was doing things that were more advanced than it actually was, and ended up shipping a more advanced and efficient overlapping window implementation because of it.