I think what OP is saying is currently you can drive between communities and not have to worry about filling up (600km to a tank). If your EV only gets 400km,

I think what OP is saying is currently you can drive between communities and not have to worry about filling up (600km to a tank). If your EV only gets 400km, how are you going to get between those locations. As another commentor pointed out, there is a lot of time for charging stations to be built.