I feel like its been a decade since anyone has offered a Stepside for sale. IMO a new take on it could be really cool.
Granted the aero would suffer and therefor MPGs too. But it obviously wouldn't be the main seller that you advertise mpgs on and you still get the useable 4 ft of bed space between the wheel wells. I can't imagine it would cost that much to give some badass off road version its own bed design.