I can be 100% wrong.
But I believe they have a rule that your daily driver can not be more than 15 years old similar to Japan? So they forced the car off the road once it ages out.
Doesn't apply to collector car (like exotics) or commercial vehicles.
So if your car is gonna be obsolete in 4 years, you are really buying it for 4 years of use.
At least that's how I understood it.
EDIT - WHAO I WASN'T EVEN CLOSE LOLOL, but real answer below: