Should Ram have built/ build this?

When are they gonna update their powertrains?
The 5.7 is 16 years old and the 3.6 is not a spring chicken either. Sure the 5.7 has lots of power to pull a trailer but the fuel mileage sucks. And the 3.6 in a quad cab will struggle to pull a 5000# trailer.
How about putting a couple of turbos on the 3.6?