Pure electric cars are not likely to ever be viable in Northern climes due to the high energy needs of interior heating. Does the motor provide enough waste heat to heat the cabin? Doesn't seem likely. And what about AC? AC is not just a luxury, take for example health care workers. They need to arrive at work clean and dry.
I never see heating/AC viability discussed.
As for torque, in industry we use DC motor drives to manipulate armature and field voltages and thus control motor speed and provide constant torque across a range of speed. You don't just apply full voltage to a large DC motor and let 'er rip, which is where the torque chart would apply.
Certainly that technology is also being used in automobiles.