One thing you might consider is the probability of vapor lock in older vehicles. With the 10% ethanol maybe fixing to go to 15% it will happen.
Fuel pumps will die and older fuel lines begin to check and leak in months.
My old carbed truck now vapor locks if you shut it off for a short period of time and then try to restart it in hot weather.
We (family) just returned from a 2500 mile round trip to Steamboat Springs Colorado (Mustang show) in a ‘68 Mustang with an EFI 5.0 and had vapor lock in external electric fuel pumps going up high passes. Others had the same problem. Now I spend $250-500 parts to put the pump in the tank.
All because the Feral govt wants ethanol