Again, any concrete examples of "being completely crippled at the slightest disturbance."? I've had lots of cars both modern and old and never experienced a disablement due to something that wasn't truly disable worthy.
A 2010 (not sure about other models) Toyota Prius has to be towed to and serviced by a dealer if it runs out of fuel and battery. An older car would have been able to be jumped and refueled.