Crash-Yes- I feel the needles are more important than the oil. If your engine is lean and not well ventilated, no matter how much oil you have you will still cook it.
I'm guessing there would be a SLIGHT increase in "room for error" @ 80:1

Put a probe on a motor and run it rich, then run it lean. You will notice a temp difference. (tried it once)

I guess you could run the same test with 100:1 and 80:1 and see exactly how much it would help.

Maybe Dick or Ralph will jump in. "The Old Guys"