Either way, the problem with E85 or E100 is the water retention over time. I'm fearful of the fact that the people who pop on this car are going to be the typical richy-rich types who park their cars on battery tenders and drive them 2-3x a year. I fully expect these types to fill their cars with E85 and let them sit 3-6 months. Some of them are going to damage their engines and Dodge will get sued 6 ways from Sunday.
It doesn't mean Dodge is going to lose those lawsuits, but never underestimate what rich people with more money than sense can do to their cars. Dodge has tech writers like myself on staff who's responsible for writing those warning and caution memos in the owner's manual that say something like, "Do not store unused E85 in the gas tank for longer than 60 days" or whatever number they decide to use.