I guess one of the benefits is that you're decoupling the energy transfer method from the energy source. If there is new development of solar, wind, geothermal,

I guess one of the benefits is that you're decoupling the energy transfer method from the energy source. If there is new development of solar, wind, geothermal, wave energy etc. electric cars will be ready to receive energy from them versus trying to replace ICE cars. Even if the energy is derived from coal, cleaning the waste products at the factory is easier and is easier to upgrade the filters rather than replacing catalytic converters with better ones on regular cars.