That's why robotics is such an important tool. If robots can make other robots from start to finish with minimal human input, then labor is so cheap you can make practically anything that used to be prohibitively expensive due to the labor involved. It's the most likely key to "near-zero marginal cost".
If we get to this point of sophistication, need goes out the window along with most jobs. Good thing too, as we'll all be hooked on VR, or some other highly addictive escape from reality.
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