At a forum in Cambridge, Massachusetts, in 1989, Jobs and Gates appeared sequentially, laying out their competing worldviews.
Jobs spoke about how new waves come along in the computer industry every few years.
Macintosh had launched a revolutionary new approach with the graphical interface;
now NeXT was doing it with object-oriented programming tied to a powerful new machine based on an optical disk.
Every major software vendor realized they had to be part of this new wave, he said, "except Microsoft."
When Gates came up, he reiterated his belief that Jobs's end-to-end control of the software and the hardware was destined for failure,
just as Apple had failed in competing against the Microsoft Windows standard.
"The hardware market and the software market are separate," he said.
When asked about the great design that could come from Jobs's approach,
Gates gestured to the NeXT prototype that was still sitting onstage and sneered,
"If you want black, I'll get you a can of paint."