With batteries, there is the time it takes to recharge. If you could somehow deliver the amps faster, what does that do to the power grid?
Way back in the 70s when I was studying Computer Science. I had a class focused on emulations, and we students had to come up with some sort of thing/system to emulate which the instructor approve and then we'd go and do it. I chose to emulate various forms of electric auto, including hybrids etc. My main source was a book called Alternatives to the Internal Combustion Engine by Robert U. Ayres and Richard P. McKenna.
My conclusion, as I recall, was aluminum oxide batteries which, when exhausted, would be left at the equivalent of a filling station, where you would install fresh batteries the way nowadays you fill up with gasoline. The exhausted batteries would be collected and recharged at special facilities then returned to the 'filling stations'. Thinking about it now, my utopian fantasy is taking the exhausted batteries to a solar recharging plant out in the desert.
There are problems with aluminum oxide batteries, but it always seemed to me they should be solvable problems.
Now, other people, including Elon Musk no doubt, must have considered the model of quickly exchanging exhausted batteries for fresh ones (even if not the aluminum oxide part), and rejected it. Why? (My thought is that maybe they are in a hurry and think building up the infrastructure would take too long. One could start with some particular locale. Maybe I-6 between California's Bay Area and LA. Renting cars to drive along there perhaps with the 'filling stations' at each end?)