Limitations of sensored motors?

Exactly. Obviously its the market then. You're using motors not specifically designed for cars, so why implement a hall sensor? But now that large scale vehicles are becomng more popular and you got companies releasing high current escs to do the job bundled with motors, why not redesign it with a sensor plug. Is one little wire really that much of a hassle? Maybe with the voltages you're running, you don't notice that much cogging, but I prefer the smoothest startup possible.