Manufacturers making functional research vehicles. Now It’s just show cars.
Remember this one? 2.3 olds quad-4 engine. twin-turbocharged, it first hit 257mph average around the test track but eventually hit 275mph over the flying mile. It was a 1984 IndyCar underneath. It was the future! How are we not racing these now? Wait, the supercar endurance division is starting isn’t it?