You’ve obviously never lived somewhere that salts during the winter. Where road salt is used you don’t see many vehicles that old.
It’s true that rust will likely be the eventual reason to retire it, but probably not for another 5-10 years.
Despite being a lower percentage than CA, there are plenty of perfectly usable 17+ year old cars on the roads in New England.
I've never seen so many not so old but already rusty cars as in Quebec, Canada.