OH BS.
About half the coffee is grown at high altitude at cool temps. If there was global temp increase they would just start growing valley coffees at high altitudes.
Besides, who says coffee might not grow better with warmer temps, I mean we would have a longer growing season.
I wonder where they grow iced coffee.
And truthfully, I doubt we even have a clue about how many wild species might still exist. Ethiopia and East Africa is a fairly big piece of dirt.