 They take more maintenance and different kinds of maintenance, and he says they become kind of a distraction because it's almost like having a prima donna car. Look at me. You've got to take care of me. I'm the one you have to think about. I don't want to think about my car. My car needs to get me where I'm going safely, efficiently, and if I have a problem, I need to be able to get it fixed quickly. And, again, also the infrastructure that's out there does that for all internal combustion cars, but not so much.