For all practical purposes a motor operating at full load under hundreds of RPM is stalled. Motors let out the smoke (or have to throttle back) if you do that too much. The operating speed range of a motor is not infinite. For really high torque applications that also demand high speed you are going to see 2spd gear boxes for the same reasons your power drill has a 2spd gearbox.
While this truck may or may not (I haven't looked at the specs) have a gearbox expect to see trucks with a gearbox (especially as we start seeing electric commercial vehicles). A simple gearbox consisting of two shafts, four gear and a dog clutch or one planetary and a dog clutch is going to be cheaper, lighter and offer less kludgy performance than over-specing the motor.
While this truck may or may not (I haven't looked at the specs) have a gearbox expect to see trucks with a gearbox (especially as we start seeing electric commercial vehicles). A simple gearbox consisting of two shafts, four gear and a dog clutch or one planetary and a dog clutch is going to be cheaper, lighter and offer less kludgy performance than over-specing the motor.