Why not both? Plug-in hybrids (PHEVs, range extended EVs, that general class of vehicle) give you the flexibility to run on whatever you can find, and also function nicely enough as a reasonably efficient generator for electrical power.

But if you have to pick one, no question, electric. The supply chains for refining and delivering gasoline far, far exceed the supply chain for charging an electric: Sun, solar panels, inverter, car. Probably some batteries on the house side in there, but if you're charging during the day when the sun is out, those are more or less skipped if you have enough panel.

Mad Max has plenty of problems. "Oh no, guzzoline is in short supply, let's use it as fast as we possibly can!" is not a particularly useful way of approaching resource limits. On the other hand, it makes for some absolutely spectacular cinema! I love that Fury Road was almost entirely practical effects - the giant vehicles driving across the desert look absolutely right, because... well, they were giant vehicles driving across the desert. I understand the Doof Wagon (gigantic wall of speakers on wheels) tended to get stuck an awful lot, though.

Hybrids are false flexibility because if the government posts the national guard to close gas stations, hybrids can only go a few miles or less in some cases on electric power. Electrics can charge at home or at friendly places along the way and with long range, but for hybrids, with 2-30 miles of range, it’s not going to help.

At worst a hybrid is basically a gas car with naive virtue signaling. At best it’s a slightly more fuel efficient gas car.

I'm referring to the 20-40 mile range class of PHEVs - Volt and crew. We're pretty rural, and the 35 mile range our Volt has will get us into town and back comfortably without lighting up the gas engine once.