There is no scenario where all gas/diesel drops off at once, lots of smaller volume of use markets will need gas and diesel much longer than cars and trucks, so there's not really going to be any problem because for billionaires construction project to happen they will still need gas and diesel well after the point that most transit stops using it.

So the niche markets will keep having access to fuel oil, gas and diesel for a long time or your global economies will crash because while EVs are cool, we are a solid 20 years from having like electric bulldozers or batteries for remote mining sites vs generators.