Fair enough sorry, Your assumptions are within the realm of possibility now that I see them - but the price of gas, price of public charging, EV range/efficiency and what's comparable cars are vary substantially. You say breakeven is 35 mpg, my source shows 42 mpg. The average fuel economy for all major makes is still only about 26 mpg according to the EPA.
But you made a pretty strong open ended statement as well
"but doubt charging an EV at a public EV charger would be cheaper than buying gas for any fuel-efficient vehicle (>35 mpg)." Every source I've read finds it costs less to drive an EV over a comparable
ICE vehicle even with public charging - and
there are few if any ICE vehicles that qualify, so you're talking HEV/PHEVs. That was my primary point.
And again, most actual EV owners often charge at home where it's FAR cheaper than any gas equivalent.
And EV emissions are lower to much lower as well, a factor in the buying decision for some of us.
Highlights of the light-duty vehicle carbon dioxide and fuel economy trends report.
www.epa.gov