Uhm ... I drive a -98 Volvo V70, 300 000 km, in central Sweden. It's no way where near EOL and it's snow and salt on the roads. If I change the brakes it's good for maybe 2-8 years more before the gearbox might give up.

The secret is to to preemptive rust measures. Just paint it like you would on a boat and change rusty parts on the underbelly before the rust spreads to the car body.

Preemptive measures are cheap and not that much work. When it's too late though ... I wonder how much greater the average car life span would be if the drivers just took a oil dispenser every third month and oiled the parts.