Then the format would have to change. They are optimized to sell skittles and slurpees as fast as possible, there would be no point in spending 15 more minutes at a current gas station convenience store.
Makes more sense to put chargers in places people park, like grocery stores.
> Perhaps they will charge extra money to charge a car at the full speed the car is capable of and hobble charging speed for a lower price.
This would tie up their charging infrastructure and space for a longer time, making less money. Gas stations & charging venues are usually space-constrained because they're located on expensive real estate. Their goal is to maximize revenue and throughput in small spaces.
No, but you can't browse in a shop while filling up with petrol (at least in the UK where we don't have those locks which keep the pump on while you walk away.)