In the US, after 10 years you can no longer get many parts for you car from the dealer. <---- emphasis They intentionally obsolete them, ostensibly to get allegedly 'cleaner ones' on the road, but really, force-obsoleting cars after 10 years instead of having ones that could run indefinitely
While legal and consumer environment may generate incentive, carmakers have no natural incentive but to sell. Any shit design, poor aging, or parts dropout is their own whole car preferential sales technique. But still, you can get limited parts selection from dealer 10+ years out, at their price. And 30+ years on cheap aftermarket, including complete rebuild kit for common models. Same for junkyards. Lern2wrench. May also be net environmentally better vs production, and much cheaper. Do the math.