Well, my 20 year old car still works.
There are 50 year old cars on my road - our cars could probably go on forever (though they won't, within 10 or 20 years my city will probably mandate electric drivetrains).
I think that newer cars are more likely to create waste for many of the same reasons.
Of course we can't extend the timeline out forever, but we can at least take steps to not _artificially_ cause obsolescence, this is distinct from the way in which a car is inherently far more useful than a horse and buggy.