In the short term, rather than swapping batteries, I’d prefer to see electric cars optimized for shorter daily travel in the <150-mile range, which would account for most miles driven, and then have ability to rent an auxiliary power unit which would instantly convert the EV into a hybrid with essentially no range limit compared to traditional automobile.
For long cross-country trips you’d connect the APU with its own fuel tank, fill up at Exxon or Texaco, and go.
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