Recent news is the EPA is reinstituting Corporate Average Fuel Standards and bumping fuel mileage requirements way up. (broken link removed) The big three car companies in the US were selling econoboxes at a substantial loss to offset all the gas hogs they were selling. Foreign brands tended to buy credits from Tesla (a major subsidy on their original line up. Now that GM and Ford has dumped their small cars, my guess is they will be having to crank out the electric vehicles to keep selling the big trucks. Stellantis does have their import lines of small cars they can try to sell but to date they have not been very successful. My guess is big high horsepower fossil engines are going to get rare.