Problems ethanol causes in vintage cars?

Wow I had no idea!!
I have the same problems with my lawn equipment and ATV's primer bulbs dnt last, running with chokes on slightly...Always rebuilding carburators. I always buy my gas 87 octane from the ethanol place down the street..Seems like in any engine you dnt use on a daily basis you HAVE to use Stabil or its all gummed up
I go to a different gas station and buy high octane non ethanol gas for hot rods and Motorcycles and never have carb issues, Let em sit for 6 months and no problem. Just thought it was the octane