If you run out of gas in a gas car you can, believe it or not, bring the gas to the car!!! But if you have an EV you need a flatbed to take the car to the charger. It won't cost you more than just a couple hundred dollars; people who can buy a $80K car do not worry about such pocket change. Besides, there is only a dozen of superchargers for Tesla; and any other outlet requires you to set up a camp right there for many hours.
300 mile range is good enough for anything but cross country trips.
This is the best possible range under best possible conditions. A reporter took this car on a trip, left it overnight outside of a hotel, and next morning it lost half of the charge. He became stranded shortly after that, despite his frantic efforts to find a public charger.
Very few people would choose to take a high end luxury sports car on a cross country trip anyway electric or not.
Tesla S is not a sports car, it's a family sedan. It just costs like a top notch sports car; but it can't go much faster than the speed limit on I-5 (70 mph.) You could drive very comfortably in the right lane at that speed, right between huge trucks :-) Calculators on Tesla's Web site max out at 65 mph. Makes sense - who would dare to drive faster than that? :-)
But otherwise you are correct; whenever I go on a road trip I always walk into my garage and spend literally hours trying to pick the best car out of tens - no, hundreds - of cars that I own :-)
Top speed is 130 (not that anyone get's up there too often on I-5, as you state)... but the acceleration was HEAVENLY... 0-60 in 4.2 sec.
There are rumors that reverse engineering reveals it’s a $140,000 car being sold for $100,000. But it’s a nice car, as most any $100,000 luxe car would be.
A little less-biased (but still PC) take on it:
http://www.edmunds.com/car-reviews/track-tests/2013-tesla-model-s-track-test.html