Re: EVs could fill up at the pump
I don't think pumping fluids makes sense for passenger cars. While people wouldn't accept 30 minute fillups at the gas station, that's not a fair comparison because the only time you need to visit a "station" with an electric car is on long trips. I can't imagine electric cars becoming widely accepted until they can handle an unexpected 50 or 100 miles of errands so what you're really doing is eliminating about 25 5-10 minute stops per year and adding about five 30 minute stops depending on your driving habits. Plus, for a bit extra you can get batteries that charge most of the way in 5-10 minutes anyway.
We will get to this point with incremental improvements of existing technology. Tesla offers such a car for about $70k and I expect my current build to meet the above criteria for $40k plus labor. "Pumpable" batteries and their infrastructure are much further off. I think once pumping fuel becomes unnecessary there will be no desire to bring it back.
Why even discuss what would happen if a battery with 10x the energy density of lithium becomes available soon at reasonable cost? The answer is easy: it will be incorporated into every mobile energy storage application within a year or two, including ground, sea, and air transport. Mayyyyybe ocean shipping would hold out for a while. I'm pretty sure it's not going to happen for long time, but I hope to be proven wrong.