Quick reply! Just posted, then watched a 10 minute video that was not as math-oriented but showed a similar outcome for a Tesla (https://insideevs.com/tesla-model-3-cost-owning-1-year-video/
), and you had already posted a comprehensive reply. Thanks for that.
In the video, the presenter did complain about the high cost of supercharging on road trips. It wouldn't take much public charging to increase the cost, IMO. EVs seem definitely tilted in favor of those who are middle/upper income and have the financial resources to take advantage of lower charging options.
Accounting for the cost of public charging will have to be one of those individual-based calculations that everyone has to make. Fortunately, for me, our trips to the coast, Sacramento, or the mountains can be handled by hotel, parking garage, or second home outlets; plus we are within one battery charge, or less, to all these places. The Bolt has been wonderful for these trips.
For EV owners in central and northern California, the PG&E bankruptcy might result in higher home charging so those figures (11 to 12 cents per KWh) could be less favorable in the future. Time for me to get solar!