Then Tesla will fail with a mass produced car.
Tesla would fail if they were trying to capture 10% of new-car sales in 2013. They're not. And they don't have the production capacity for it. The majority of Americans are not ready for an EV. An EV is not practical for most one-car households. An EV is not practical for people without a convenient way to plug it in.
But there is an enormous market of people with convenient electrical service for whom an EV as the second car in the household would be perfect. And as the fleet grows, more charging infrastructure will be built, and the market will grow. There is a real and significant niche for EVs today, and that is fueling sales of Leafs and Teslas and others.
Tesla's real challenge isn't lack of potential customers. It's competition from bigger, more well-known auto companies getting into the EV market.
For those that would like a 500 mile pack, it sounds like you're willing to pay a premium for convenience, independence, security. All emotional items more than anything else. That's not intended as derogatory, we all have different value systems and different levels of income to allocate to our values.
I'm really curious though, if you're willing to pay a big premium for those values (independence/security), then why are you looking at an EV today? There are some tremendously nice ICE cars when you're talking 100-130k (which is where a 500 mile pack would put you) that would be a better fit for the characteristics you value most...
The characteristic I value most is NOT BURNING GASOLINE. I'd never have bought a sports car in a million years, and I'd never have spent $117,000 on a car. I bought the Roadster because it's electric! And because I couldn't get a Leaf, and those were the only choices to upgrade from my 35-mph Zap Xebra that I'd been driving for 4 years, and which I bought because it was electric. And I'd have kept driving the Xebra, with all its inconveniences, if I had not been able to get the Roadster.
I love the Roadster because it's beautiful, powerful, and most of all quiet and does not use any gasoline.
Gasoline stinks, pollutes, accelerates global climate change, and funds terrorism. And gasoline engines are noisy, dirty, require messy oil changes, and they make the car vibrate, which contributes to motion sickness.
Luxury gasoline cars have NOTHING I want in a car. And gasoline sports cars are worse. The only car I've ever seen that was as beautiful as my Roadster was an antique Maybach Roadster. And IIRC that would have cost me twice what my Tesla cost. And it burns gas.
So that's why I don't buy a luxury gas car for the "independence," and why I dream of a 500-mile (or 1,000-mile, while I'm dreaming) electric car. When I do have to go farther than 245 miles, I take the Prius: The most efficient gas car, not by any means the most luxurious; and a LOT cheaper than those "tremendously nice" $100K ICE cars.