They are. They are only company specing. full SAPS oil in passenger vehicle diesel engine. FCA is not on par BMW, Mercedes and VW/Audi when it comes to diesel technology in 6cyl diesel engines (or 4cyl). They were there at the end of 1990's (not quite as good as BMW).
This oil is still patch on the potential issues in the engine. More likely than not, SCR/DPF equipment in RAM is coming from same suppliers as for BMW, GM, MB, VW etc. However, all those companies recommend C3 oils.
Your DPF is not going to die at 100k, it will die at 130-150k.