CThe hardest part of a humanoid robot isn't the brain—it's the hand.
MMusk spent years hyping Optimus. Now the hand is suddenly "shockingly difficult"?
CHe said it in a Tesla Owners of Silicon Valley interview. A robotics account called Robotics Biz on X posted the clip.
MWhat else did he say? Precision and force in the same motion?
CThat's exactly the problem. A hand needs to drive a screw and not crush a pickle jar.
MYou also need a robot that doesn't have to be human-shaped to do that.
CNo, wait—a general-purpose robot working in human spaces needs human-style hands. A claw won't open a jar.
MA robot that burns five hundred watts just to walk isn't replacing a person. A brisk human walk uses about three hundred ten.
CSo we should bolt a specialized arm to a table and call it a day?
MI'd rather have something that works before we talk about a five trillion dollar market.
CThat market is exactly why hands get fixed. Whoever solves dexterity first wins.
MMorgan Stanley's five trillion dollar number assumes everyone wants a humanoid in the kitchen.
CBut Tesla says the hand and forearm are harder than the rest of the robot. That's a rare admission.
MBecause a hand has so many actuators and sensors working at once. It's not one hard part, it's dozens.
CA researcher at the University of Sheffield says making robots human-shaped makes them harder to design and build robustly.
MAnd Hamed Rajab, writing in ScienceAlert, says the brain-first approach makes humanoids physically inefficient. That's his argument, not mine.
CIt's a fair argument. A robot that uses more energy than a human to walk isn't obviously the future.
MEnergy efficiency improves. The hand is a bigger blocker than power draw.
CIs it? Or is it just the part that looks impressive in a demo?
MA demo is exactly what a hand video is. Show it gripping, the crowd claps, then production slips.
CThat's cynical. Tesla didn't slip because of a demo; it slipped because the hand wasn't good enough.
MRight, so the demo promised more than the hardware could deliver. That's my point.
CNo, you said the shape is a trap. I'm saying the shape is the product.
MThe shape is a marketing choice. A robot arm with a gripper can assemble parts better and cheaper.
CIt can't set a table, sort laundry, or hand you a wrench from a toolbox.
MHow many homes are actually buying humanoids? Right now, none.
CBecause the hand isn't solved. That's the premise.
MAnd the premise could be wrong. Maybe general-purpose doesn't mean human-shaped.
CWe will want one. The companies solving dexterity first—Tesla, Boston Dynamics—are the ones that matter.
MMeanwhile an account called The Embodied Era on X says Boston Dynamics picked suppliers for ten thousand Atlas robots by end of twenty twenty-seven.
CThat's from Korea Economic Daily. No official word from Boston Dynamics.
MExactly. A procurement report like that can move stocks before a single robot ships.
CA different account, MindSpark on X, says Atlas hands now grip precisely, turn objects, and use tools. Also no company confirmation.
MRight, so we have two unverified Atlas stories in one segment.
CBut the underlying point stands. Hands are the hardest mechanical problem in robotics.
MI'll give you this—Tesla reportedly scrapped its summer production goal because the hand was too hard. That's hardware, not an AI demo.
CExactly. Actuators, sensors, skin designed to be replaced. That's why Musk said it's shockingly difficult.
MWhich is why the human shape is a trap. Human-shaped machines are harder to build robustly.
COh come on—you can't drive a screw into wood without an arm and a hand.
MYou can build a better arm that isn't limited to five fingers.
CThe human hand has about twenty-seven degrees of freedom. Optimus has about twenty-two. It's close and still not enough.
MClose but not enough is the entire story. That gap is years of hard engineering.
CAnd that's why this is interesting. It's not a demo, it's a real race.
MYou say real race. I say real money spent on fingers.
CFair. But when a robot opens my pickle jar without crushing it, I'll stop complaining.
MDon't hold your breath. The pickle jar is a higher bar than a rocket landing.