How nice would high octane gas be?

from the many posts there are those that have reported great results with ethanol blended gas used regularly and not stored for any length of time, but the bad results reported are usually from lengthy storage of ethanol blended gas.
My point was i have had ethanol free gas go bad as well from storage...and i used stabil which makes me think stabil doesn't work and neither do other additives.
..i thought this was all good info?