I can still forsee oil becoming another jevons paradox resource even after it gets phased out for transportation. Last I read 5% of oil production used for plastics, I can imagine a future where we adopt more plastic materials with $10-20 barrels and some new material science. MIT developed plastics comparable properties to steel a couple years ago, supposedly less resource to produce than steel/gass. Wouldn't count oil out if it can replace most steel for cladding purposes. Or even structural.
I would expect per barrel it would become a lot more expensive if you're not extracting at the same scale. $1000 a barrel or more if you're only extracting 5% of what we are now, for chemical processes.
I'm thinking scenario where world will be using 300% more oil by adopting 50x more plastic use for large scale application with oil selling at 1/3 of the price, loe enough to break models of more expensive extractors so cheap producers have near monopoly over commodity. All very hypothetical. But imo essentially everything you see in built environment could be covered or finished in plastic if performance / price right. I can imagine world where we use much more oil.
