My "presumably" is whether the book recognises the extent to which NeXT was founded basically as an attempt to complete/reboot Apple's "Big Mac" project. The usual story you get is "something something '3M', and post-Apple Jobs decided it would be nice to do a workstation aimed at the educational market". In fact it's pretty clear that Jobs was persuaded to start NeXT after Rich Page (p. 195 in Isaacson), and IIRC also other people on the Big Mac team, begged him to provide a lifeboat for Big Mac.