I think many people assume you should always charge a Tesla fully "just in case", but that takes much longer (hours longer) than filling up at a gas station. In practice people take shortcuts, especially when its freezing outside and they'd rather be arriving sooner at their hotel. Its human nature. The author's mistake is trusting the mileage reported by the car in cole weather, then trusting Tesla's PR lackey when he was told the range loss was a software glitch.

"When I parked the car, its computer said I had 90 miles of range, twice the 46 miles back to Milford. It was a different story at 8:30 the next morning. The thermometer read 10 degrees and the display showed 25 miles of remaining range"