Me either! I guess I am just old and set in my carbureted gasoline ways. But "I just bet" that there's somebody out there in aftermarket land that has something that can make it happen.
I've been selling a couple hundred E85 & Gas tune combos for 03-05 Srt-4 Turbos for about 6 years now. They're specifically designed to easily swap between E85 and Pump Gas. Just run the tank below 1/8 and as the car is filling up with the "other" fuel, flash the matching tune.