I think that the focus of the OEM tune and most other parts is to hit a spot that satisfies the most potential customers and keeps cost inline. Upgrades are available for lots of things- suspension, sound systems, etc- that FCA could probably have created if the return on investment was there for them. I am NOT an engineer, but I suspect that it is easier to tweak almost anything to satisfy a market than it is to create that thing out of the gate. It takes enormous capital to create the original and much smaller companies can be profitable by making modifications.I am mystified by the fact that private companies can tune a truck’s computer to make it run more efficiently with less soot which in turn increases the longevity and still meet EPA emissions criteria. Why wouldn’t the RAM engineers do likewise? Certainly they know how to do this. My guess is they have been directed by upper management to produce a truck that makes through the warranty period (and is very conservative as to EPA emissions criteria)then after that who cares. That away they can sell more trucks.