Another factor your discounting is performance. Your 90's vehicle is a low power slug compared to a modern car. If a car maker could sell a car with 80's to 90's performance levels, they could get a lot more mileage out of vehicles, but people don’t want that in a new car.

I would rather change a tire and be on my way in 20 minutes rather than wait for assistance that could take hours.

This is incorrect. You can fix a fairly large hole with a plug (up to ~7mm in my experience). A fix a flat can won’t seal that.

An exhaust with no mufflers can cost a lot of torque compared with the same setup with mufflers. Some amount of back pressure is oftentimes good. Also, if you are comparing turbo mufflers with an open exhaust on a 300 horsepower car, you are looking at loosing maybe 3 to 5 hp at most. Not worth the noise.