What specific modern development forces engineers to solve many of the original challenges anew?

Answer

The need to build entirely new systems like SLS and Orion from scratch.

Modern efforts necessitate building entirely new systems, such as the Space Launch System (SLS) rocket and Orion capsule, meaning engineers are developing and qualifying new hardware virtually from scratch, rather than simply inheriting established methods.

What specific modern development forces engineers to solve many of the original challenges anew?

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