The alcohol in ethanol attracts moisture.
True. There would have to be a change in the design of fuel systems to protect against the corrosive effects of ethanol and methanol. That can be done. Cars that do not have the redesigned fuel systems will have to work on gasoline with a minimal ethanol/methanol blend.
Yeah, I worded it poorly. The methanol did, too. You could actually be disqualified from race day if, when they tested your methanol, it didn't clear quickly from the test, and too much moisture in the methanol would allow it to remain cloudy in that test. I can't remember what they did to test it, they mixed it with something, hell, maybe water, at a specific measurement. Too much moisture in your fuel, and the mix wouldn't clear, and they'd DQ you.
You had to store it sealed tightly in a drum, up off the ground for the best results. I'm not sure why up off the ground was supposed to work better, some said it would absorb moisture from the ground, but I'm not sure how that would be possible through a metal or plastic tank. Maybe sitting on cooler concrete allowed for it to attract moisture into a poorly sealed container. I don't know.
What is interesting, is that ethanol fuel has been around for a decade, and I bought my folks old RV, that has been around for 17 years. This thing has sat more than it's ever been driven. Every year it starts right up after sitting for six months or better. No problems. That being said, the EGR valve did go out on it a few years back, but I don't think it was the ethanol. It's never given me issues with power, starting, pulling or anything, and it's been running 10% ethanol fuel for at least 6 years now, that I know of.