Fred Brooks' Ghost Haunts the AI Productivity Debate

A resurfaced Fred Brooks insight — that even a tool doing 'everything except the thinking' yields only a 30% improvement — is challenging maximalist AI productivity claims.

Computer science legend Fred Brooks' observation is making the rounds again, shared by @lemire: even if a tool did everything except the thinking, it would only yield about a 30% productivity improvement, because the thinking is most of the work. The implication for AI tools is pointed — if coding agents handle boilerplate but developers still spend the majority of their time on architecture, requirements, and debugging conceptual errors, the productivity ceiling may be lower than the hype suggests.

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