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"There will be plenty of fancy composite materials for specialty applications"

There are a lot of "specialty applications" I think, where plant based material is not ideal. Otherwise I agree.

Why? Can you name a few example current alternatives and upcoming contenders?

Are we talking far-tech where plants and other biome actors are engineered to produce materials in a particular shape and manner?

Bamboo is one material that has seen some traction in replacing plastic, especially in kid food items etc. however they do break easier. Hemp is also finally starting to have a real comeback but still has a lot of roadblocks ahead because of almost a decade of “bad press”.

It is a financial question... Which product makes most profit, in whole? Whole includes, in part, "The Commons".

When?