I expect that you throw your old car away whenever you get a new one?
I doubt it, because
> Drive it until it’s primary worth is scrap.
But that means selling it for scrap, which is still not "throwing it away".
Besides, a car that's 30 years old is still worth more than scrap, and even then, scrapped cars are still sold for money.
So, no, there are very few people either throwing or giving their cars away after driving it for however long it lasted.