There is no data presented to back the claim that supercharger-only charging is the norm, and I have cited a source to indicate that most consumers are capable

There is no data presented to back the claim that supercharger-only charging is the norm, and I have cited a source to indicate that most consumers are capable of parking next to an electrical hookup. See link in my original comment. Given the weird assumption that the calculation is based off of, I feel no need to write a full blog post on the subject; that flaw alone means this analysis is off by a factor of 2-3x (2x going by average 13¢/kWh US-wide utility price of electricity, 3x if the consumer lives in an area with demand-smoothing incentives that give lower electricity prices at night).