Things become simple by abstracting out and hiding the complexity. My teenager doesn't need to know about cylinders and pistons and fuel injection and air-fuel

Things become simple by abstracting out and hiding the complexity. My teenager doesn't need to know about cylinders and pistons and fuel injection and air-fuel ratios and timing and radio reception and electronic motors and A/C compressors and alternators and power brakes and traction control and ... Just needs to know the interfaces to control and maintain the car. We've made driving so simple that even a 16-year-old can do it.