Will you leave the M5 on the driveway for months when it reaches it's mileage limit and drive around in an old Seat bus trying to convince people that you prefer the Seat and it has nothing to do with the extra money per mile?
You seem to think my 5 series doesn't get used or something? Sure, it's use profile has dropped such than it has gone from doing 18,000 miles per year, to more like 5,000 - 8,000 miles per year, but it is hardly "left on the driveway".
As for the prefer my Seat bit. Clearly it's a matter of needs / kids preferences. They prefer being driven in the Seat, they are happier in the Seat, so every trip is quieter in the Seat.
Sure, when I go to work, or take the wife out for dinner / cinema, I / we take the 5 series. If we have the kids with us, it's in the Seat.
Different cars are used for different things. Some cars are better at some things than others. So I use the car that is best suited to the drive ahead. What is so difficult to see about that?
I do openly admit it has almost reached it's mileage limit though (the 5 series obviously). But that is only a fabricated limit on the deal I took the car out with. And I care not one bit about going over it. It's not exactly breaking the bank with the excess mileage charge. But I do plan on VT-ing the car anyway, so the mileage the car has done has no real consequence regardless.