Having listened to both Boeing and Airbus recently, neither seem to see any alternatives to SAF for long haul though. Hydrogen has it's challenges. I heard som

Having listened to both Boeing and Airbus recently, neither seem to see any alternatives to SAF for long haul though. Hydrogen has it's challenges. I heard someone did the math on running Heathrow exclusively on it who came to the conclusion that you'd basically need 3-4 reactors to produce it.