The point of the Edison motors approach is that you can just drop in a diesel engine - their initial goal is to electrify trucks used for industrial work in Canada by making them series hybrids.

It will work great for them because these trucks are designed to be modular and easily repairable (they are driven hard and WILL break when their owners need them). I would not be surprised at all if it develops into an impromptu standard just because so many eyes are on the system all the time.

Battery swaps are not practical, but the guy you're replying to is making the point that an electric vehicle could be built with a modular, removable power source, and converted between gas/hybrid/battery/hydrogen/natural gas/whatever later in life depending on the needs. That's just not possible with a vehicle which directly connects the powerplant with the wheels - there's too much nonsense like transmissions and differentials to deal with when you do that.

I think it makes a ton of sense for trucks, much less sense for cars.