Why does the Audi A7 use a Mild Hybrid system?

I've noticed that the Audi A7 is described as a Mild Hybrid vehicle. I'm wondering why they chose to use this type of hybrid system instead of a full hybrid or electric system. Can you provide any insights?

The reason Audi chose a Mild Hybrid system is because it offers the most efficient and cost-effective option for their luxury vehicles. By combining a traditional combustion engine with a small electric motor and battery, the A7 can maximize fuel economy and reduce emissions without compromising on performance.