At some point, the petrol stations start closing, and petrol vehicles start having range anxiety. The antiques get served by a little EV bowser service that comes round and delivers, but you won't be able to drive them in cities.

(diesel will hang on a lot longer, so there may be a period of refinery retuning and petrol stations serving only diesel?)

Well you cant just get rid of Gasoline in the refinery process. Crude oil essentially gets destilled. The different fractions are split based on boiling point/weight. Heavy fuel oil-> Diesel-> Kerosene->Gasoline-> Naphta-> Propane/Butane whatever. That is why making new Plastic is so incredibly cheap. You need (i think) ethylene to make plastic. Ethylene is a byproduct of oil refining. If no one buys it, the whole refinery grinds to a halt because you are not allowed to burn it anymore. They practically give this stuff away. Same thing would happen to gasoline. If fewer people need Gasoline, it will become crazy cheap since you cant really do anything with it, except burn it. So it really isnt that easy. IF you get rid of Diesel/Gasoline you will also get rid of the entire petrochemical industry.Elastomers, plastics, lubricants. A huge lot depends on the sweet dino juice.

Cracking and chain lengthening* were covered in my GCSE in chemistry, and given GCSEs are the UK school leaving qualification, anything in them can't be particularly difficult or mysterious in industrial practice.

Not claiming this would be free or anything like that, just that a well-known possibility exists.

* I forget the technical name, my GCSEs were 26 years ago

Plastic isn't a single material. Some plastic materials (e.g PE, polyethylene or PVC, polyvinyl chlorine, but also others that use ethylene derivatives as intermediates) require ethylene, but there certainly are plastic materials which are produced without any involvement of ethylene or other petrolium derivatives.

> (diesel will hang on a lot longer, so there may be a period of refinery retuning and petrol stations serving only diesel?)

Perhaps, but don't diesel engines also run on used chip fat lightly sieved to get rid of the potato solids?

In 20 years there will be no shortage of cheap, old EVs on the used car market. Petrol cars will be just for the enthusiasts and collectors.

At least in some jurisdictions, cars old enough (eg 30 years) are considered antiques and are exempted from emissions requirements.

Laws can always change as more and more people make use of loopholes to avoid taxes. Same how EVs lost their subsidies as more and more people are buying them. Governments always adapt to losses in tax revenue by finding new things to tax, it's the only thing they're efficient at.

And in some jurisdictions, there are "incentives to scrap older, more polluting cars in exchange for a grant or discount towards a newer, cleaner vehicle"

e.g.

https://carowl.co.uk/wisdombase/selling/car-scrappage-scheme...

https://en.wikipedia.org/wiki/Car_Allowance_Rebate_System

Only if there are very few of them. If there's a critical mass of EV refuseniks in the future they will be banned.

At some point EVs will be cheaper on the sticker price and cheaper to run. The US car industry is desperately trying to prevent this, but it looks like China is crossing that point.

(I would be very interested in sticker price / fuel price / subsidy / tax accounting EV vs ICE breakdowns from inside China)

I think they're already cheaper in China, especially on the low-end where (as per Vimes' Boots) sticker price matters more than TCO.

China's got this, for example: https://en.wikipedia.org/wiki/Wuling_Hongguang_Mini_EV

That's extremely cute. The Euro version is as low as E13,000: https://nikrob.lt/ ; let's not forget that depreciation will make secondhand versions even cheaper.

What's the crash safety on that electric carboard box versus a 13k used ICE VW?

New EV prices are still falling for entry-level models. This is not the Ferrari, of course.

In a few years new EVs prices will be below equivalent ICE vehicles. Total cost of ownership already often is.

Second-hand EVs already are a bargain. EV owners complain about poor resale prices, but that's good for the buyer.