My elementary rationale to this is electric dirt bikesPower = Torque x RPM
So ... it depends. Also if you use a gearbox or not (typically for hybrids you might have one, for pure EV ... I don't think it makes sense).
Not every EV is crazy Torque like Tesla eh. Less torque = typically less current. And less insurance premium.
Mototec for example uses 24v for 500w bikes, 36v for 1000w, 48v for 1600w, and their 72v machine has a 5000w motor.
There’s numerous comments saying ev don’t use 48v so I guess my corollary is because of the instant demand makes it less sensical?