Not only the tech developed, but also studying the retrieved artifact: we don't have a ton of hardware that's spent 50 years in space. What happens to all this stuff in a vacuum getting radiated, baked and frozen that long. Metals, hoses and gaskets, insulators and wires, semiconductors, dielectrics etc.

If we're going to colonize the solar system, we have to learn how to build hardware to last in that environment.