I've recently been dabbling in the money machine known as plastic injection molding.
What if there were a method to produce plastic components without having to spend money on metal molds? If there were a gel-like substance that could morph into the shape needed, this would eliminate high lead time to produce molds and drastically reduce the cost of producing such said molds. For the sake of having an amorphous mold, we could ultimately exclude the term undercut. Much like making sand molds, but in an extremely shortened time frame and environmentally safe manner.
One can dream.