One thing not yet mentioned is that ethanol draws water from air. So tanks can rust more.
Living far from sea where humidity is usually low, I have less problems with stale fuel. Only once had to change fuel in a lawn mower.
On all petrol engines I nowadays have two last petrol fillings before winter hibernation with ethanol free alkylate petrol (Aspen). Comes in 95, 98, 102 octane RON. E.g. the Norton WD16H stood unattended for 5 years filled with Aspen in a barn. Started second kick. Saves a lot of time not have to drain carbs in 14 engines.
The diesel engines can run happily after years of standstill, if filled with winter diesel with less renewable content.