It's not an "exotic" fuel; its a different fuel and has to be used appropriately. All cars on the road today can run a 10% blend. Apparently marine engine manufacturers aren't as far along. It's an easy enough change to make, but owners need to pay attention to what they're doing during the phase-in.
One of the issues with biodiesel, for example, is that it has a detergent effect. It helps clean the engine and keep it clean. This is a nifty thing in a new vehicle, but it can be a problem in an older truck engine with 500,000 miles of gunk in it. I don't know if ethanol in older engines has a similar effect.
If gasoline with 10% ethanol is introduced for the first time into an older engine, it will probably require a couple fuel filter changes.