That would be safer. Though part of the change out would have to be contact cleaning. I would also think you could have diagnostics to monitor resistance.
Honestly, I doubt we will see all electric cars based on this design.
However, if they can produce the product at the price point they claim, we will probably see them in hybrid vehicles. Current batteries cannot accept current fast enough to make regenerative breaking very efficient. A 10 kwh cell that weighs 60 lbs and can basically accept and deliver power as fast as you need it would make for a pretty cool car.
Of course if you can blast out that much electric power it may lead to an all electric drive with an on board diesel generator to keep the cell topped off. Solves the rapid recharge problem for cross country driving. You wouldn’t need ad much storage. Could be plugged in at home to trickle charge for routine driving. And would be pretty efficient to boot.