I've been in an old Subaru Justy whose floor pan had been rusting for years, and it wouldn't have stopped squat coming through and hitting the driver. Once, the car's owner was driving us to a music contest, and we started to hear some scraping. He pulled over and pulled a piece of metal off the bottom of the car, and we kept driving.

That's never going to happen with a Tesla S. (Read that both in a good and bad way.)