US AI datacenter spending as share of GDP now exceeds historic railroad and highway buildouts combined
rvp · x · 2026-09-28
A cited comparison shows that US spending on AI datacenters, measured as a percentage of GDP, now exceeds what was invested in railroads and highways combined during their respective buildout eras. The figure is being used in debates over whether the current AI infrastructure boom amounts to an investment bubble. The post offers little beyond the striking datapoint.
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