CATL have
announced their next generation of Shenxing cells will do 12C, so that's five minutes.
BYD are claiming 10C for their next generation cells.
Even if those claims are bold, it's pretty clear that charging rates are improving very rapidly. A five minute charge in a couple of years is looking pretty feasible. Given the time it takes to buy snacks and go for a piss, I think most people will be very happy with five minutes. I don't think one minute is really that much of an advantage over five.
That does mean you need to have a 100 kW charger handy. So that's not going to be off a generator. Hell, the power supply to my whole house is only 45 kVA and that's a pretty fat pipe for a residence.