Given that some of the Tesla batteries weight 800 pounds, I suppose the meaning of “quick swap” would depend upon the definition of “quick”, as Willy Clinton might say. Not to mention you’d need a “spare” 800 pound battery laying around to swap, plus the chain hoist to do the swap with. Wonder if your average soccer mom can operate a chain hoist good enough to move around a pair of 800 pound batteries without dropping or bumping anything important and without a lot of unnecessary high amperage arcing.
The battery swap idea is not a new one. Any distribution center in the US that uses electric forklifts has been swapping out batteries for years. You’ll need a charging station and some sort of mechanical lift to lift out the old battery and put the newly charged one in the car.