If one were to fly only electric aircraft there would undoubtedly be a BIG limitation on the pilot certificate. Electric engines leave a big hole in pilot training because of the simplicity of the power system. No run-up required, that I know of; no monitoring of temperatures and lubricant pressures, Just flip the switch to on and, excepting flight control check and ATC, you are ready for takeoff. How much will flight range be affected by using cabin heat during cold weather? Or deicing equipment?
I have heard no discussion of multi-engine procedures, never mind electric engined transport aircraft. Will the weight of high-power engines and batteries require a greater multiplicity of engines for large aircraft? Is electric flight going to progress beyond single-engine airplanes under, say, 12,500 lbs? Just food for thought.