Elon Musk: "There are really only three hard things for humanoid robots: the real-world intelligence, the hand, and scale manufacturing.
And I haven't seen any even demo robots that have a great hand, But Optimus does have that.
We had to design custom actuators, basically custom-designed motors, gears, power electronics, controls, sensors—everything had to be designed from physics first principles. There is no supply chain for this.”
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