Old-school microwave ovens; one knob for effect, one knob for timer (which implicitly starts the microwave), and one button the open the door (which implicitly stops the microwave).
Today's modern microwaves ovens have _horrible_ UX. I talked to someone a few years ago who'd worked at an oven manufacturer and told me that UX people aren't involved in designing these ovens anymore; the process is entirely driven by marketing departments requiring more buttons, weird sliders, digital UIs and other ridiculous features - all to increase sales and convince people they need a new microwave when 99% of people really don't.
Today's modern microwaves ovens have _horrible_ UX. I talked to someone a few years ago who'd worked at an oven manufacturer and told me that UX people aren't involved in designing these ovens anymore; the process is entirely driven by marketing departments requiring more buttons, weird sliders, digital UIs and other ridiculous features - all to increase sales and convince people they need a new microwave when 99% of people really don't.