A few reasons I haven't gotten this upgrade are as follows no of which are price or not wanting a faster car.

A: the car is my daily driver I don't have time to send out the ecu to get tuned and then get sent back (not sure if the car was your daily driver most will have the same issue)
B: I live in California so an ECU tune without the ability to have a stock ECU to switch out at smog time doesn't make a lot of sense.
C: If proboblems arise with the ECU, it's my only one I'd be fooked!
D: California Gas in most areas is 91 Octane.

Mopar Performance made Computers to swap out with the stock one which was sooooo easy to upgrade with all there cars except these for obvious reasons it's a shame. Until they find an easier way to do these without having to ship your ecu some of us will have to skip that upgrade not by choice.