This article mystifies me. He is whizzing rough estimations off the top of his head, so that might explain, but… He omits the dramatic difference in internal c

This article mystifies me. He is whizzing rough estimations off the top of his head, so that might explain, but… He omits the dramatic difference in internal combustion efficiency vs. electrical motors, identifies that electric doesn't mean zero emission because of generation sources, but then declares hydrogen to be the hope of zero emission. Your summary also misses that it is the density of the energy storage that is about a factor of 40, not the system as a whole.