I've never worried about Ethanol free gas because it is not available in my area - so since 2013 I've never used it in a Kymco, Honda, Suzuki, Piaggio scooters - or Yamaha & Honda motorcycles.
Never a problem - all 6 vehicles were EFI. None were garage queens and all were ridden regularly and in all 4 seasons of Ohio weather.
I never use additives because I use only Top Tier pumps at gas stations - and most of the time it is SHELL Nitro premium.
BTW - never used ethanol free gas or additives in my lawnmowers which can sit, unused, for months. Start right up every spring.
I imagine how many new owners are freaking when they read something in his manual which seems to state he must use a fuel which is simply not available in his area. DID the dealer just sell him a grenade - or maybe.... he can relax and use what all the other local riders are using.
I've no idea what the boat dock at the reservoir is selling - but I don't see a line of helmeted guys with gas cans or HD's down there, either.
I wonder, is it time for some new thinking on the use of ethanol fuel .....and modern vehicles?
Stig