Right. So it tells you that typically even when superchargers are needed the driver doesn't need 100% to get where they're going. In order to need the 100% you have to be driving 400 miles in one trip.
The author acts like this is a huge deal. As if every Tesla driver will be filling up their Tesla at a supercharger as often as every other driver fills up their car at a gas station. It seems like a very minor point to most. 400 miles is about the limit of what I'll drive on a road trip, anything more than that I'll take a plane. So if I had a Tesla and I took a vacation once a year within 400 miles, it would mean spending 0 minutes filling up my car for 51 weeks out of the year, and adding an extra hour on each end of the trip. I'd probably be annoyed at the delay if it didn't coincide with a meal but it would probably just remind me how awesome it was that I never have to stop the other 51 weeks..