Ex-compute veteran rebuts Dario's 'pace the frontier': compute doesn't idle, it reroutes
basedjensen · x · 2026-09-13
Hensen Juang, a compute infrastructure veteran of 20 years who helped design what was then the largest compute deployment ever, expands his response to Dario's "We Must Pace the Frontier" into a Substack essay.
Key arguments:
- Compute does not idle — it reroutes. The frontier is gigawatts of firm power contracted years ahead, hundreds of thousands of accelerators already invoiced and on ships, cooling loops, substations, and depreciation ticking from day one. None of it pauses for a CEO blog post.
- If the labs in the room agree to train slower, the chips get resold, leased, or repurposed to those not invited: mid-tier labs, sovereign funds, defense contractors, and ten thousand fine-tuners with a corporate card and no safety team.
- Read from operations, he says, pacing the frontier is "a change request written without a power invoice in the room" — fine intentions, harder physics.
The essay systematically rebuts the feasibility of frontier-lab-coordinated slowdown from an infrastructure and economics standpoint.
Related event: Veteran Compute Engineer Rebuts Dario's Pace-the-Frontier Call(2 posts)→
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