Well, if you’re vigilant enough (which it smartly seems that you are), I’m sure its not a problem. I just get a little…sloppy about it sometimes. So, I get the E0, add SeaFoam as a stabilizer/cleaner, and so far it’s made up for my irresponsibilities. 
I currently store my generator with a full tank of E0 and StaBil. I drain the carb’s float bowl after running. I run it until warm and change the fuel at the start of hurricane season. E0 is available close by so.
After a bad experience with race gas (103 octane) in my lawnmower just to finish my small front lawn, I never did that again! Seems the high octane overheats the exhaust valve and closes up the tappet clearance to less than zero. Hot valve = no compression
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I have to question that. I drive a Volt and Chevy does a lot of stuff to keep the gas from going bad. First the tank is pressurized. That keeps the volatiles from evaporating away. The Volt software keeps track of how old the gas is and if you go too long without running the engine it will do “Engine Maintenance” and run the engine for awhile. I have 85,000 miles on my Volt now. The engine may have been running for only 20 or 30,000 miles of that.
Your friend with the Volt might be having other problems with the engine but it’s not because the fuel went bad.
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Ethanol was a problem when first introduced. Like almost everyone here has said, cars now are designed to run on it, even to E85 in some cars. As for absorbing water, that gets burned up. Back in the day the solution for water condensation in the gas tank was adding a small container of ethanol to the tank. As for power equipment, before Tygon fuel lines ethanol would deteriorate fuel lines. I still run across that problem with lawn equipment and older snow mobiles. I also endorse using Stabil for stored fuel and running carbs on power equipment dry for seasonal storage.
Re-read my comment. I didn’t say because the fuel went bad. In fact, all I know about it is it was fuel related.
Tygon is a brand name used by Saint-Gobain. Which Tygon material is used for fuel lines?
Not sure of the details. Only know it is marketed online as ethanol resistant fuel line for small engines.