reusing as much of the 1970’s shuttle tech as they can
And reusing the tech, but not the hardware. NASA are throwing four RS-25 shuttle engines (some of which flew multiple shuttle missions) into the ocean with every SLS launch.
Do we? It’s already years behind schedule, billions over budget, and doesn’t really have a use beyond Artemis. Also, the Exploration Upper Stage (one of the major planned upgrades) is being developed by… Boeing.
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