We have mainstream electric vehicles now and more are on the way. A very large part (40-60%) of petroleum is used for gasoline. That will wreak havoc on oil producing places, although who gets hit how hard and what consequences it has is impossible to say.
The developing world, a group very cost sensitive and unlikely to switch for environmental reasons, is putting gasoline vehicles on the road much faster than the developed road is taking them off.
For electric vehicles to eat the world they have to be cheaper than gasoline counterparts. Not only for luxury electric vehicles to be cheaper than luxury gasoline vehicles, but for the cheapest gasoline motorcycle/scooter/car to be more expensive than the cheapest electric motorcycle/scooter/car. Given the current cost materials inside a battery/electric engine compared to the current cost of materials inside a combustion engine it’s unlikely to happen with our current approach.
The developing world can't pay much for ICE technology, and more importantly can't sustain it on its own. It will ultimately follow the lead of the developed world with a slight delay.
As more oil is freed up by reduced demand in transport, I wonder whether we will see more cheap plastic flooding our cities. People are switching to electric in part because they are keen to reduce their reliance on petrol (and its cost), but nobody is really moving away from plastic.
How do you figure that? The Saudis have a ton of cheap oil, but they still want high prices and high demand. It's one thing to say they will sell to petrochemical forever, but IMO peak oil was reached in 2019, which isn't good for countries whose main revenue is oil.