Railroads hit ~10% of GDP before demand existed — an AI bubble analogy

abhiadesai · x · 2026-09-26

Responding to Noahpinion's chart showing railroad investment peaking near 10% of US GDP, the author muses that people likely made similar doubts during the railroad boom — questioning where long-distance freight revenue would come from when no cities existed on the West Coast. A historical analogy for AI infrastructure investment: infrastructure often precedes demand.

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