Gasoline is only good for about a year before it starts to degrad even with fuel aditivies. You use non-ethanol gas but you're maybe at absolute best getting 3 years out of it before it will begin to gum up your engine, disintegrate your fuel lines, etcetera.

The Mad Max future is not going to last long

And windshields/screens.

As well as tires, lubricants, tools, etc I guess. People tearing around the desert in vehicles with flawless glass is maybe the most unrealistic part of that image for me.