Not really, since they haven't used real rubber in fuel systems for decades. And if you have such a vehicle, those items would need to be replace with neoprene components.
I've never understood the desire to run alcohol. It costs more to produce, reduces MPG, so you have to use more to go the same distance, negating any positive impact you may get when blending it with gasoline.
That is all correct. It's a bunch of left-wing political hocus-pocus...we have enough oil and natural gas to produce gasoline for hundreds of years.
The only common sense is; it's no where near as horrible as MTBE, the previous toxic anti-knock agent, which also made gasoline water-soluble.
If it affects rubbers hoses and gaskets, shouldn’t it be cause for concern?
Alcohol softens neoprene and rubber causing it to fail. Old fuel pumps will fail and replacement ones do not do much better.