to help ease your mind a bit: those folks who regularly uses their OPE engines (fuel never gets to sit around for too long, and not-doped), never has any fuel-related issues even with E10.
Those folks (my subjective observation so YMMV) who came online and complained about E10 , most of them are just the kind that would be ignorant/complacent enough to let something goes wrong (usually their own fault, IMO) before they haphazardly joining an internet discussion board to seek help, rant or bitterly complain.
I don't care whether you are a fan of startron, sta-bil, B&S (made by sta-bil BTW), etc. so long as the fuel is being taken care of properly, they will stay good and fresh for up to 3 yrs in my experience, and can still be used in full confidence.
case to the point: I just rotated out my 3+yrs old generator fuel jerry can that is doped. I'm currently using it up in my B&S mower (which I meticulously look after) and my Honda (BE) pressure washer during fall maintenance work. Do I worry about losing a carb due to this fuel?! nope.
Just remember: fuel deteriorates due to high heat (high ambient temperature swings) during storage; and moisture in the gas. Also: excessive air inside the storage container (i.e. 1/2 filled jerry can) will leave more room for the "essence" portion of the gasoline to evaporate.....
Bet ya most ignorant lurkers don't even know (nor would they seriously care) enough to know these basics when it comes to gasoline storage.... therefore the likeliness of their fuel goes rancid and ruining their carb is, I must say, very high.
Good luck and sleep well....
Q.