I can't remember when ethanol came to central NY, 10-15 years ago? Seems we were the last to get it, as everyone else was already talking about it. As there were many reports/accusations of more than 10% alcohol, I tested mine once, to find it just below 10%.
I was working on chainsaws in the 70's, and there was plenty of trouble with stale gas before ethanol. It sure seemed like the gas/oil mixture was much worse than just straight gas at gumming things up, and melting fuel lines. Homelite did finally tell us that the plastic being used more and more in the fuel tanks acted as a catalyst. Even though it didn't melt, or degrade, somehow that plastic caused the fuel mixture to turn rancid very quickly. I don't know how, but I sure know it happened!
I have gas[ohol] delivered here to the farm for the old tractors, trucks, and little engines. No trouble yet.