Not just that, most people will most likely just charge at home and use battery swaps as an absolute last resort or when they're on a long road trip. I'm sure the cost associated with a battery swap is not "cheap" (i.e. diffing your battery capacity versus the battery capacity of the new battery and multiplying that by the total cost of the new battery. You weren't thinking you can just roll into any 'ol battery depot and swap out your 5 year old Model S battery with a brand spankin' new one, right ;)?)