Back in the 1990s, the Chevron website had a whole section on the "back area" just on oxygenated fuels and how they "ran different" than what we had at that time. No holds barred, it seemed, as they had been researching and collecting data for years, it seemed. They mentioned all of the "bad things" related to vehicle performance, including "extended crank time to start" (although they made not distinction as to just what that meant, in "time to start" between the existing stuff and the oxygenated stuff).
The other side of things is that oxygenated fuels were first needed in some sections of Colorado in the 1980s to combat poor oxygen levels in the atmosphere. An already thin atmosphere due to the altitude. It helped and then got expanded nationwide. But as automotive historian Ed Wallace noted later, by the time that OEM carburetors had been replaced with more efficient fuel injection on new vehicles, the real need of those oxygenated fuels was diminished a good bit. But by that time, the legal battles had already been done so oxygenated fuels were what we all got. With ethanol and MTBE (a known carcinogen) being split almost 50-50 to make a 10% oxygenate addition to existing gasolines. Then, when some municipal water supplies started to show minute concentrations of MTBE in them (from atmospheric sources, i.e., rain), then ethanol became the only oxygenate in the fuels, to the approx 10% level.
With the original RFEs, I did document a 3.2% decrease in fuel economy in the 1970s car I was driving at that time. Not a big decrease, but one anyway. Full E10 is supposed to be 6%, from data. Stillo not much, but at the volumes of fuel consumed, that loss in gallonage and related fuel taxes can be substantial, especially in a large, mobile strate as TX or even CA. I did see that report the TX Legislature research arm did and it was a huge chunk of change. Certainly large enough that NO legislature would want to do away with it.
Agreed, modern fuel systems are designed to deal with ethanol'd blends. Which have been much greater in many South American countries, so our North American and European OEMs are not stranger to what it takes to build a good ethanol-tolerant fuel system.
Just my observations from over the years,