Oh, don't get me started.

I have actually worked on designing cars in the long ago, in the before time.

Most of the great improvements in car mileage is due to oils and lubricants.
Not because we are making the engines better, or the driver train stronger.

Cars are so similar today... except at the actual part level.

EVERY single 4 door sedan, every hatch back econo-box should all have interchangeable parts.
Like we have standard bolt patterns for wheels. Every car of similar size should use the same brake rotor and callipers.

Every car should be using the same computer for engine control. There are such tiny differences, and computers are so much overkill, that you should take a generic-engine-CPU and connect it and it should figure out what engine it is connected to and work just fine.

And there is a million other parts that should be standard.
But noooooo, what we get is cars coming out that have a brand new tire size, so only one vendor is actually making replacement tires.

But just like our electronic devices, we are no longer the owners, we are just termed as the current users. And are at the bottom of the list when it actually comes to control over our items.