Rough on old style plastic parts but engines are lasting longer than ever because designs take it into account - look at the Indy racers - engines take a serious beating like road vehicles will never see - not to mention dragsters with their Nitro Methanol. Ethanol and Methanol are a bit different but Ethanol combines with water (my biggest grievance about using it) and Methanol breaks down in water so it wouldn't be practical for regular distribution systems which all collect water in the tanks.
Would love to see it phased out but wonder why non-ethanol gas costs 15% more than the more expensive to make ethanol-laced crap.
Indy used methanol for a long time, much safer than gasoline. Watch the videos of the 1964 Indy 500 where Eddie Sachs and Dave McDonald were killed. One downside is the flames can be invisible.
A few years back ethanol sponsored a car, they have used it since.