I guess Roy and I are the only ones with issues. I have a chevy II with a totally new fuel system (tank, sending unit, hardlines, fuel pump, carb). Rebuilt 327, 4 speed. Let it sit couple years as life's events got in the way, even had Stabil in the tank, and when I decided to get back on it, noticed some black goop under car. checking fuel lines, soft and spongy, stinky tank, drained it and something akin to stinky bad molasses came out (remember, new tank). Went through 2 gallons laquer thinner cleaning adn cleaning out lines, replaced fuel lines, dang, fuel pump affected too, but carb was ok.
This was in closed outbuilding, no heating/cooling and Alabama diurnal cycling.
Same thing happened couple years later to my 390 galaxie. New tank/sending unit, new fuel lines, new pump, new carb, fooled around and lost track of time and let it sit too long, again with the soft swollen fuel lines and stinky molasses gas, so cleaning again and again, rubber diaphram in fuel pump shot.
I have a friend who does small engine repair, says he sees alot of small engine issues with little rubber lines that sit in fuel tanks swelling shut or getting soft and pulling shut and they won't run. Back to my Galaxie, carb (previously rebuilt) shot too, so I ordered a new Holley 600, gee the tag hard wired to it said "use of ethanol blend voids any warranty". If there is no problem, why the tag?
Now, I must admit, was recently given a Lebaron by a buddy, it has LOTS of issues, drove it home on 3 year old gas that seems to have no problem. Maybe it is my 2 cars being stored in unheated/uncooled building and whereas his Lebaron was stored in open air pole barn? don't know.
But, I am glad for you guys that have had no issues, but just becuase you haven't doesn't mean it isn't real. Maybe it's the blend happening at the tanks Roy and I buy from or where the Holley guys buy from? don't know. But, it is real.