Why does the Audi A7's suspension system use an aluminum wishbone design?

I've noticed that the Audi A7 has a unique suspension system compared to other cars in its class. It seems to use an aluminum wishbone design instead of the more common MacPherson strut design. What is the advantage of using this type of suspension?

The use of an aluminum wishbone design in the Audi A7's suspension system allows for a lighter overall vehicle weight and improved handling and agility.

This type of suspension also results in less unsprung weight, reducing impact on the wheels over bumps and providing a smoother ride.