Steve Jobs was a performer. When I worked at a university, I remember being called over to Alex Kluge's desk: "Steve Jobs is going to be streaming in a few minutes. Alex has it set up." This was back in the late 1990's when Apple was struggling, and it was not clear how they'd make it. We gathered around the largest monitor I had ever seen. Alex made sure the video was working, then he went full-screen. We all stared and saw Steve deliver something so advanced, so unexpectedly lovely that I heard some engineers and professors swearing and cussing, and saw them squint in disbelief.