I imagine the type of people who drop $100,000+ on an electric sports car have more than one vehicle, and that the Tesla is likely just one of their hobby cars. Also keep in mind that battery power fades whereas gasoline doesn't; it very well could be the case that the last time our hypothetical Tesla driver parked his Roadster it was fully charged, but then depleted over weeks of neglect. Of course, you could also make the case that it's wastefully flamboyant to buy a car just because it's fancy and expensive and then not even drive it, and I would agree; but that's another conversation altogether. EDIT: additionally, even when you do run out of gas, it would still be excessive to say that you deserve to have to pay $40,000 to get a new engine (obviously gas-powered cars don't work that way, I'm stretching the metaphor a bit, but you get the idea).