Oh, right, the USA. Sorry, you can pull 2.5kW from any outlet here. Still I do find it quaint how people can find theoretical problems that real owners never seem to have. When I first got my BEV I was living in my sister's garage while finding a new home. It was a reasonably remote rural location and I was charging from a wall socket yet never had any issues going where I wanted when I wanted. When got my own house I had the choice of single phase 7kW charging or bring in 3 phase for 11kW charging. However I already knew from experience that even 7kW would be overkill for normal use so went with that.
Oh, and you theoretical case? Toilet paper would be a trip into the nearest town (pop 20,500), the local supermarket has 2 x 60kW chargers in the car park. Or I could buy toilet paper at the local gas station, they have 4 x 200kW chargers in their car park. I could walk a few block to Subway. By the time I was back from either I would have got enough charge to cover the return trip and back home I would have more charge than when I left.