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Polygon
With big heavy bikes like cargo etc you have a lot more low speed control (manoeuvring) if you pedal while braking (like in the easiest gear) and don’t lean. With a torque sensor this is fine as the motor is sensitive to how hard you pedal but with a motor that simply pumps on or off as you turn the pedals it can make you lose control if it is too powerful. Therefore a switch that kills the motor when you activate the brakes can be useful without torque sensor. Afaik No motors in the Uk are technically legal if they operate while coasting.
Also when im approaching a stop sometimes I brake to slow down and also turn the pedals to get myself in an easier gear in preparation. Dont really need the motor pumping on in that situation