I was watching a YouTube video (https://youtu.be/6jzG-BMannc?si=GcuFJ0MvVKH-rDgL&t=189) showing an RC car with 4 electric motors, each individually controlled. The car turns left or right by speeding up or slowing down the motors on one side, instead of using traditional turning wheels.
This made me wonder: why don't we see real cars using this method?