[jeroen79]

It is not outdated just because it isn't reusable, at least it can use green hydrogen fuel.

[perihelions]

That's deceptive marketing. Most of the fuel (by mass) isn't hydrogen/oxygen; it's the solid propellant in the booster rockets. That's very, very not-green: it's a chlorine-rich mixture that destroys stratospheric ozone.

[DarmokJalad1701]

> green hydrogen fuel

It is manufactured by steam reforming of natural gas which produces CO2 as a byproduct.