The $25k car is going extinct?

Nobody else has said it so I guess I will.

The reason the US car industry does not want a $25k car is that the financing opportunities are crap for a car of this low cost.

In the same way that airlines exist to offer you a miles based credit card, the US car dealerships survive by offering you a loan for the car. Or perhaps, a car to go with your structured finance opportunity.

unless there's illegal collusion, someone will see a market opporunity and step in to fill it.

That said, a quick search for new cars under $25k: Chevrolet Trax $20.5k, Nissan Versa $17.2k, Hyundai Venue $20.5k, Kia Soul $20.5k, and Nissan Kicks $22k. Other options include the Toyota Corolla $22.3k, Hyundai Elantra $22.1k, and Volkswagen Jetta $22.5k

I think maybe the article is BS?

I strongly agree with a generalization of the article - that cars have increased in price relative to their quality and value to the point that it's nationally problematic. There's a whole pile of cars that have gone from sub $20k to the high $20ks and above. Most of the cars you list will also have essentially non-optional packages, delivery charges, and more costs rolled into their price. At the same time it's not easy to find used cars that don't cost nearly as much as new cars unless they're pretty old and high mileage.

And it seems clear there's no rational reason that cars should subject to a higher rate of inflation than any other good.

It seems very clear that somehow the market is broken. Whether it's because new competition is impossible because only the established can achieve the necessary economies of scale, protectionist regulation,the dealership model, or something else, it's pretty clear something is broken. Just like with much of the rest of things in the US and maybe the world.