I've been in a Better Place car here in Israel and experienced the swap, it works. Also, Shai Agassi recently completed a full cross country trip (North to South). Small country, but still.
What makes you think this is not a viable solution?
Exactly. It's about the same shape and size as New Jersey (smaller actually). I can't count the number of times I've driven across the entirety of New Jersey without a second thought because I wanted a cheeseburger.
New Jersey is about 170 miles North to South from the tips. But parent said "I've driven across New Jersey," which can be as little as 40 miles East to West depending on where you measure from.
What makes you think this is not a viable solution?