The only reason oil is so cheap right now despite much higher consumption than in 2007 is that Saudi Arabia specifically decided to massively increase production, breaking OPEC. They did this because they see the writing on the wall. Better that they get all the remaining money to be made from oil and cut out entirely the people who extract oil less cheaply from shale and other sources.

Peak Saudi oil, perhaps.

Peak profits from oil. They're desperately trying to sell as much as possible before renwewables eat their lunch. This is why the free market cannot solve global warming by itself - we'd need to leave lots of oil in the ground and countries like Saudi Arabia have a huge amount of latitude to drop prices in order to ensure this doesn't happen. It's not enough to just be cheaper than oil, you need to be cheaper than anyone can afford to drop the price they sell oil at to undercut you.