The constraint on point-to-point air travel is runway and tarmac capacity, not room in the sky.

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• A functioning institution is a rare exception and never grows by itself: it was assembled by a founder with good judgement. SBSamo Burja9 Jul 2018aviation
• AI systems should be understood as something between airplanes and humans, since it can no longer be assumed they lack humanlike motivations. SAScott Alexander1 Sept 2026aviation
• AI's energy use is an easier end-use to decarbonize than aviation. ZHZeke Hausfather5 Aug 2026aviation
• Airplanes are already almost as energy-efficient as they could possibly be, so no redesign will radically improve their efficiency. DMDavid MacKay3 Nov 2008aviation
• Because software is the cheapest part of a system to change, other disciplines lean on it to paper over their own physical problems, and that reliance has killed people. HWHillel Wayne20 Jan 2021aviation

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