> Which to me sounds like a good thing for the rest of the world?
It probably isn't a bad thing, but let's not overestimate the beneficial effects. The reason oil prices are high right now isn't because of cartel fuckery, it's because of Trump and his war. And oil supply chains are in such chaos because of Trump's war that even if it ended tomorrow it would take markets multiple years to return to a pre-war state.
The bottom line is that oil prices are going to be elevated for years to come, and when oil prices are high, OPEC has nothing to do other than sit back and collect the profits. And thanks to the ongoing solar revolution, oil's days as the world's predominant geopolitical poker chip are numbered; by mid-century OPEC won't be relevant anyway.
By mid century, worldwide fossil fuel usage will be higher than it is today. Solar will take over some of the electricity production including transportation but in the overall energy mix it will largely be a supplement, not a replacement. Total per capita energy use from all sources will continue to increase at a rapid rate.
> By mid century, worldwide fossil fuel usage will be higher than it is today.
Even if this turns out to be true, it would be irrelevant. The reason that oil occupies the geopolitical role it does today is because of its potential to rapidly bring the entire developed world to a halt. Oil will always be in demand because of its many useful applications (and this demand may even grow in absolute terms despite declining per-capita consumption, because the global human population is projected to continue increasing well into the latter half of the century), but as an energy source, by 2050 it will have so many highly-available complements that an oil cartel will be as relevant as a potato cartel.
The potato cartel seems to be at least somewhat effective.
https://www.cbc.ca/news/world/potato-cartel-fries-tater-tots...