Some time back, at a visitors
Some time back, at a visitors' center in Utah, the lady at the desk cautioned us about our planned route. Seems those exits on the map were "ranch roads", with absolutely no services. We needed at least 126 miles in the tank. That would, of course, leave us looking at the low fuel warning starting at 76 miles. It would have been in the dark. Might be phone service there by now.
Point is, if you get one tier--speaking north to south--west of the Mississippi, even on the Interstate, don't let your fuel/juice drop below 100 miles, or in the case of the Utah route, maybe 175.
Which is to say, some of the range scenarios in the article are simply insufficient.