Nervous system transplant
https://old.reddit.com/r/Justrolledintotheshop/comments/jlh5tl/nervous_system_transplant/

Pretty soon it will be easier to rewire a horse than a car.

^{Think of the wiring harness this is going to require.}

Volvo's new seatbelts use real-time data to adapt to different body types
 

https://www.theverge.com/news/679359/volvo-seatbelt-adapt-body-type-sensor-ota

That's an interesting idea, and I bet it will help to prevent injuries.  Though, the complexity may make it less reliable as the car ages.  I've noticed that a lot of advanced features tend to get buggy somewhere between 80k and 120k miles.

> get buggy

I resisted electric windows as long as I could. Very handy, but often old jalopies seem to have window malfunctions and since I mostly drove old jalopies...

In fact, the back windows were glitchy and then non-functional before the Subaru died.