Sure, and the Falcon rocket is not fully reusable, either. It's a lot harder to reuse the second stage, because it's the part that goes to orbit, which means it's moving very fast, and has to lose a lot of energy in order to land softly.
Again, this makes me wonder if the gulf here is academia vs industry, or if it's just 1980 vs 2020.
Again, this makes me wonder if the gulf here is academia vs industry, or if it's just 1980 vs 2020.