Liquid hydrogen takes 4x the volume of standard aviation kerosene. Coming up with on-jet liquid storage of hydrogen of that volume is a rather steep engineering

Liquid hydrogen takes 4x the volume of standard aviation kerosene. Coming up with on-jet liquid storage of hydrogen of that volume is a rather steep engineering hurdle. And hydrogen, liquid or not, will require some rather impressive storage and handling techniques at the airport. If I were to bet, I would say that converting hydrogen to kerosene will be far cheaper and more efficient than trying to power long distance flight with hydrogen