I know VW kicked up their warranty duration when they had public perception issues about quality. Once they proved they could produce a car that wasn't bug ridden, they dropped the warranty coverage to previous levels. Hyundai also used that method in selling their cars.
Perhaps the quality of FCA vehicles has risen to level that such long warranties across the entire line no longer are a marketing benefit and just extra cost that does not need to be incurred by the manufacturer?
IIRC: My 2005 Ford had a 5 year/60,000 mile bumper to bumper warranty but emissions equipment was longer and my 2003 VW had a 3 year/36,000 mile bumper to bumper to bumper warranty and a longer 5 year/60,000 mile power train warranty.