Why did they throw away the Soybean/Hemp car patent, in the 1940s?

Soybean car https://en.wikipedia.org/wiki/Soybean_car

Were they corrupted by oil and war to sell it?

Consider that a car made of plastic is something that only works pre-Ralph Nader. Now the NTSB would veto it in milliseconds.

The Slate Auto pickup will have plastic panels [0] - I assume they're not expecting to be shot down by the NTSB.

0. https://www.topgear.com/car-news/video/everything-you-need-k...

Wasn't the entire Saturn brand built on plastic car panels?

Solid state batteries solve for EV trucks.

The Chevy Silverado EV truck wins at towing but not being towed, FWIU.

They could have won with a bad EV platform to have just used the existing F-150 part streams.

Did GM intentionally or accidentally squander EVs with the EV1?

How could firms encourage EV conversions of trucks in order to get this solved?