When I think about this topic I believe you have to look at "why do I want an electric car?" and I think the main answer is to save money. At this point in time driving a tesla car, where you pay for the energy up front, then pay to charge at your house or swap your battery out for a higher price than gas is not saving you money.(my infiniti gets close to 350 miles on 50 dollars of gas so 7 miles a dollar vs Tesla battery swap 200 miles for 60 dollars so 3.33 miles a dollar) Not to mention an infiniti which is a pretty decent car costs 35000 versus 70000.
The "energy up front" fee is $2000, if I recall correctly, which will take you about 40,000 miles. If you do most of your charging at home, then yeah you might never use $2k worth of paid-for supercharger energy over the life of the car. The battery swaps are not intended to be used for every charge, obviously. I think battery swaps will probably account for less than 1% of all "charges" for a long time, and will be an occasional convenience only. Even factoring in the swap fees, pre-paid supercharger fee, and home electricity costs, it is still much cheaper to operate a Tesla than a gasoline car. If you really want to get down to the nitty gritty, you have to factor in no oil changes, fewer moving parts and mechanical issues, and even less brake pad wear in the Tesla's favor.
But even setting aside the costs of ownership and forgetting that it's an electric vehicle, the Model S is still a high-end luxury sedan with extremely high ratings, and many people think it's worth the price even without fuel savings.