I think it would only be electric vehicles would be functional in a post apocalyptic scenario.
I don’t think people appreciate the complexity of oil refineries and oil supply chains. A lot of the oil industry is happening somewhere else and people don’t think very much about how fragile it is despite the large number of economic problems caused by even minor disruptions in that industry.
And gas goes bad after about a year. So…
It’s far simpler to to set up a wind turbine to charge an electric car than it is to rebuild all of that oil industry infrastructure.
Preppers should really have electric cars and wind turbines and solar power. But those types tend to be just paranoid and don’t really think straight.