From the articles listed you only show its harmful to older engines, 2-strokes and fuel moisture.
Older engines and 2-strokes are what ethanol was designed for, it creates a lean condition that burns hotter and more completely. Modern engines simply adjust the A/F ratio to compensate, which renders the ethanol useless and harmless, the only effect is reduced MPG and consumption of food that could be used to feed starving countries.

2-strokes need oil thats compatible with ethanol.
Older engines need the carb adjusted.
Moisture can be prevented by not buying crap fuel from shady stations.
Problems solved.