Refrigerated fuels like LOX are a pain in the ass. You need pressurized fuel tanks and need to fuel on the launch pad which means your launch pad needs to be m

Refrigerated fuels like LOX are a pain in the ass. You need pressurized fuel tanks and need to fuel on the launch pad which means your launch pad needs to be more complex and that a lot more steps need to be done as part of the launch countdown. Plus you can't just put your fuel in a rail car and ship it halfway across Russia.