>If the worst happens and you need to travel for an emergency, you just need enough juice to get you to a DC fast charger. You’d only be spending 10 minutes charging anyways to carry on. I would place bets that most people do not keep their gas cars filled to 100% in case they need to do that weekly emergency 300-mile drive that everyone seems to have.

That's because gas stations are plentiful in most areas and you usually only spend a few minutes refueling. If gas stations are rare and/or the pumps are slow or unreliable, you bet most drivers will keep themselves topped up more often than not.