Will the end of the Delta rocket mean an increased price for Centaur and SLS? The Delta program had continuous funding irrespective of launch to support things like the liquid hydrogen supply chain. Centaur is a much smaller rocket, and SLS launches, to a first approximation, never. So who is paying to maintain all the hydrogen trucks, tanks, liquefiers?
Hydrogen itself is a fairly common industrial chemical, but my impression (maybe wrong) is that liquid hydrogen is rare and weird.
