Part of my PO skepticism has to do with powerful negative (rather than positive) feedbacks on price. Back in the day, the Drummers assumed the price could go to $200, $400, $1000/barrel, and never come back. The 'problem' is that at $100 tar sands oil, ultra deepwater and oil shales all look like a good business proposition with existing tech. I.e. at sustained prices of $100 they will all be developed at a large scale, as we have seen. At $150-$200 coal to liquids and gas to liquids look like stupid easy ways to make $$. IOW, At $200 there is almost an unlimited amount of (synthetic) oil to be had from converting coal. From an (existing) tech perspective, sustained prices above $150-$200 appear effectively impossible. Here 'sustained' means the 2-4 years required to build a lot of plants.
And then learning curve makes all this (existing) tech cheaper. Maybe the $100 shale oil and tar sands and ultra deepwater can, with some development make money at half that in 5 more years of operation/learning/amortization? Then the current demand/supply equilibrium price could drop to that level...If we went for Coal to Oil in 2025 or 2035 at $150 (current $$), maybe after a few years, it could drop back to 75...
But the thing is, oil didn't top out at 150 due to all these miracles of technology. It topped out due to the reason you already mentioned - supply & demand. $150 oil was unaffordable to a large enough part of the population it cratered the economy. Over extended people had to chose gas or the mortgage, defaulted and then we all saw the results. Lots of people out of work means a lot of people who can't afford gas, reducing demand back down to levels that $100 oil tech can meet.
Problem with oil is that supply/demand curve is backward. When you are producing widgets, the more you make the lower the unit cost. Oil is opposite, the more we produce the more expensive it gets. Our economy isn't built to deal with that.
Economy recovers, demand up, price goes up, crash, rinse and repeat. Does anyone really thing we are in a genuine recovery? That is anyone but stockbrokers?