There are movement for heirloom tomatoes, heirloom beans (for example from Rancho Gordo)—why not heirloom or fancy bananas, too? There are apparently 1000+ potato varieties as well, few of which are eaten, especially outside South America.
There's another 15-20 varieties which Indonesia and other S.E. Asian communities live by, and I make a point of eating from the fruit stalls at markets when I visit Thailand and Vietnam. The differences are great. I wish we had them in Oz but mostly the problem is the skin: Like sugar banana they bruise if you look at them. Lady Finger are sufficiently robust then can stand the supply chain and respond well to Ethylene ripening.
I miss Gros Michel. They were just amazing. They're really hard to find, so in saying we have them in Brisbane it's like gold dust: really, we don't. If you go to the migrant suburbs there's a few.