This could be but in practice it doesn't work.

Both the governments and the manufacturer benefit from you driving a newer vehicle instead of keeping your old car running. Topics like environmental impact safety etc. are higher priority compared to repair-ability. Additionally most people don't care.

Additionally there is the issue of licensing and regulation around the hardware and software of a vehicle. The regulation in my country is written around "type approval" and this means you can not change the car significantly beyond what is approved during the car "type approval" process.

On top of that this market is ripe for abuse of planned obsolescence as the product is very technically complex and there is no real regulation against it.

This is why I drive an old car and a simple modern car, most modern smart tv's with wheels strapped to them will become bricked the moment the manufacturer doesn't support them anymore (after the 10year lifespan).

In my experience, it does actually work. Tesla model s had an issue with the flash memory endurance, and the NHTSA made them replace it. Which they did, and upgraded the 3G modem to LTE while they were at it. My 2013 Model S is still going strong, still gets software updates.