[mmichaels1970]

Grain-based ethanol will decrease in popularity soon enough

Do you remember corn-based "Gasahol"? It was also the next big thing, got popular for a while in the late 70's early 80's, and faded away just as you are predicting for ethanol.

[P-40]

and faded away just as you are predicting for ethanol

It didn't fade away. OPEC & Friends just opened the spigots and flooded the market until the alternatives went belly up. Americans fell in love with the 'cheap' gas. Until 9/11 anyway...then a lot of people began to understand that the gas was not so cheap no matter what the pump said.