Good old history,
So, for a couple of days, Chris would incorporate Steve's suggestions from the previous day, but Steve would continue to find new faults each time he was shown it. Finally, Chris got a flash of inspiration.
The next afternoon, instead of a new iteration of the calculator, Chris unveiled his new approach, which he called "the Steve Jobs Roll Your Own Calculator Construction Set". Every decision regarding graphical attributes of the calculator were parameterized by pull-down menus. You could select line thicknesses, button sizes, background patterns, etc.