I tripped over this article about breadfruit today:
https://www.smithsonianmag.com/smart-news/is-breadfruit-the-climate-change-proof-food-of-the-future-180980665/
They seem to feel that planting more of them would be a good thing, but it always worries me a little if people become dependent on a single tree. However, the article does state, "But, when used in conjunction with other food security measures, scientists believe it does show great potential for helping to tackle hunger, even as the climate continues to evolve." As part of a food forest in the right climates, this could well help out when rice and wheat production are reduced.
The same organization, suggests how to cook with it here:
https://www.smithsonianmag.com/arts-culture/cooking-with-breadfruit-43056061/
I always like when a group who says, "this food is wonderfully easy to grow" also support me in the kitchen!