Apparently one reason cars from the 90's last longer than new ones (which almost always fail in some way immediately after warranty expires) is the advancement and increased usage of computer modelling / simulation. In the 90's they had pretty much mastered car manufacturing and made parts which they were certain would outlast the warranty, erring on the side of caution they mostly ended up making parts that lasted much longer than the warranty.

Now, with computer modelling and simulations, they can accurately design a part to be as cheap as possible to make while being just durable enough to last for the duration of the warranty. D4A did a good video on it.. https://youtu.be/SeMZGICNSMg?si=sideQIwNBr9s9QW6