Which in turn took quite some influence from Cedar/Mesa at Xerox. But one might as well say that KDE 4.9 (2012) is based on MacOS (1984), that doesn't make it a

Which in turn took quite some influence from Cedar/Mesa at Xerox. But one might as well say that KDE 4.9 (2012) is based on MacOS (1984), that doesn't make it an "early GUI" in my eyes.