An MIT roboticist who cofounded bankrupt Roomba maker iRobot says Elon Musk’s vision of humanoid robot assistants is ‘pure fantasy thinking’

MIT roboticist Rodney Brooks warns that current bets on humanoid robots are misguided and likely to waste the “hundreds of millions, or perhaps many billions” being poured in by VCs and big tech because machines lack the tactile dexterity of humans—whose hands contain roughly 17,000 mechanoreceptors—and cannot be reliably trained to perform complex manipulation merely by watching human videos. He urges redirecting funding toward university research (even at a fraction of current spending) and predicts commercially successful robots in 15 years will not look like humans (they may have wheels, multiple arms and different end‑effectors); his critique comes as industry signals diverge — legacy player iRobot has filed for bankruptcy and is being sold after its value plunged from about $3.56 billion in 2021 to roughly $140 million, while Tesla and Figure continue bullish timelines and valuations (Optimus sales targeted for 2026; Figure valued at $39 billion).

Analysis

Rodney Brooks, an MIT roboticist and cofounder of iRobot, argues that current large-scale investments in humanoid robots are likely misallocated because machines lack the tactile dexterity of humans; he cites the human hand’s roughly 17,000 low-threshold mechanoreceptors and the absence of a comparable touch-data tradition as core barriers to training via human task videos. Brooks criticizes approaches taken by companies such as Tesla and Figure and recommends reallocating capital toward university research, estimating that a smaller fraction of current funding directed to academia would yield faster progress.

The critique arrives amid concrete industry signals: legacy player iRobot filed for bankruptcy after its market value declined from about $3.56 billion in 2021 to roughly $140 million this year and will be acquired by its main Chinese manufacturer and lender, while Figure reached a $39 billion post-money valuation and Tesla projects Optimus sales in 2026 with asserted in-factory autonomy. Market sentiment in the article is moderately negative (sentiment_score -0.5) with per-ticker sentiment IRBT -0.9 and TSLA -0.4, suggesting elevated downside risk to pure-play humanoid stories.

For investors this implies heightened execution and valuation risk for humanoid-focused firms, a likely re-rating of companies that cannot demonstrate reliable manipulation or tactile sensing, and a strategic opportunity to favor task-specific form factors or groups advancing tactile-data research; monitor independent demonstrations, academic funding shifts, and vendor claims of autonomous dexterity as the critical catalysts and risk triggers.

Key Decisions for Investors

• Avoid or substantially reduce exposure to iRobot (IRBT) equity given its bankruptcy filing and pending acquisition after a drop from ~ $3.56 billion in 2021 to ~$140 million
• Delay new commitments to pure-play humanoid private rounds or high private valuations (e.g., Figure at $39 billion) until independent, repeatable demonstrations of tactile dexterity or manipulation are provided
• Require verifiable milestones from Tesla on Optimus (sales timing 2026 and in-factory autonomous task evidence) before increasing any robotics-related TSLA exposure
• Favor exposure to companies and suppliers pursuing task-specific, non-humanoid form factors or to research partnerships advancing tactile sensing, and monitor shifts of VC capital into university-led research as a positive signal