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@Alon @mekkaokereke @14mission Hyperloop has other major flaws, like that pressure differentials have (I think) a quadratic relationship to diameter (which is also why pneumatic systems in buildings don't go bigger than ~2" tubes), or how to evacuate a massive closed tunnel quickly in case of fire.

But Musk also tipped his hand early by making it clear that Hyperloop's whole purpose was to soak up revenue California had set aside for high-speed rail (which we're now building 10 years too late).