You handsome devil you!
Here in the USA, no doubt. But! He lives in Europe where gas is a bit more expensive. So a little extra mileage for him is very helpful. Also, why not for everyone else. While it maybe just a toy for you, others may drive there car a bit more than what you list.
Cam timing is everything. Next to the state of tune and then drivetrain ratios. As you know all three working together cam make great HP but also work for mileage.