Comment by DonHopkins

>As a comical aftermath to the story, John next told Steve point blank that the iMac mouse “sucked.” Steve sighed and explained that “iMac was for first-time computer buyers and every study showed that if you put more than one button on the mouse, the users ended up staring at the mouse.” John sat expressionless for 2 seconds, then moved on to another topic without comment.

Sounds like John Carmack and Doug Englebart are on the same page:

https://www.smithsonianmag.com/innovation/douglas-engelbart-...

How Douglas Engelbart Invented the Future. Two decades before the personal computer, a shy engineer unveiled the tools that would drive the tech revolution. By Valerie Landau, Smithsonian Magazine, January 2018.

>In 1979, Xerox allowed Steve Jobs and other Apple executives to tour its labs twice, in exchange for the right to buy 100,000 shares of Apple stock. Once Jobs began working on these ideas, they became even more streamlined. Engelbart’s mouse had three buttons, which he used in different combinations to perform a range of tasks. After licensing this invention from the Stanford Research Institute, Apple decided it would be simpler to give it just one button. Engelbart lamented that the mouse’s capability had been dumbed down to make it “easy to use.”