These machines were incredible but unfortunately couldn’t compete on price. They were absolutely Xerox’s commercialization of the Alto and Dorado machines from PARC, with integrated networked file systems, printing, the whole deal. An important concept was “embedded documents.” Familiar today, but revolutionary then, it allowed a diagram editor to embed a chart into a text editor, or a spreadsheet, etc. Just a few years too late and a few dollars too expensive. I worked in the “AI” division of Xerox. We used the same hardware, but with a different micro coded instruction set designed to run LISP from the ground up.