A more complicated gearbox means more friction which lowers the fuel efficiency of the vehicle. Since the battery is the most expensive part of a BEV, maximizing fuel efficiency is always a priority. It determines the cost and the range for the car.

EVs with multiple gear ratios do exist though, the first of which was the 2020 Porsche Taycan. The first gear lets it maximize torque at low speeds (up to 62 MPH) so it can set 0-60 records, then the second gear lets it maintain a more economical motor speed for highway driving.