True enough. But it gets at the (in my opinion) false premise of the cheaper scheduled maintenance being the reason for the change in schedules.
Now, true enough, it is cheaper for BMW when they're at 15000 mile intervals. But I just get the feeling it's more icing on the cake than the reason for the intervals.
To an imperial city, nothing is inconsistent which is expedient.
--Thucydides, 420 BC