And thus, this monoculture became susceptible to a single fungal plague that is killing the plantation!

And a replacement species is not available.

> And a replacement species is not available

There are many varieties of bananas still grown in SE Asia, the original home of the banana. If somehow Cavendish is wiped out totally, it's not too difficult to pick another cultivar, breed resiliensy to it, and restart the whole banana industry.