My strongest behavioral signal: seven suppliers, eighteen months, every one moved — Eaton bought Boyd, Vertiv added coolant specialists, Flex took JetCool (3,000 W/device), Modine restructured, others built lines. Capital conviction, not commentary. Operators' barriers — standardization 39%, expense 38%, reliability 35%, maintenance 26% — frame industrial maturation, not physics. NVIDIA's CEO promises chillerless on 45-degree water; whether warm-water design deletes a layer or relocates heat is a keynote claim awaiting deployed evidence.