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Just don't encourage all your friends and neibors to ditch ICEV's and go all electric.
As of now, have an ICEV as a second car if you insist on having an EV. Whether you have the EV or not, keep at least half a tank of fuel in the ICEV.
The future of EV's is still unkown. It's definitely good to think of these scenarios. But when and if the time comes that most or all people have an EV I'm sure there'll be a way to figure that one out.
One idea would be to have some sort of emergency air battery. Air batteries are usually not rechargeable. But they can hold a lot more energy than even a lithium ion battery. The air battery could be used in those emergency situations where you need to go for hundreds of miles without charging.
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