Yeah, but I think it is all related - there were various programs to reuse the Saturn and other rockets, there are pictures of them dunking engines in the sea &

Yeah, but I think it is all related - there were various programs to reuse the Saturn and other rockets, there are pictures of them dunking engines in the sea & studying what it does to them or even the rather insane concept for a giant helicopter for catching the first stage of Saturn V. Reading the early space program history it really looks like the consensus was "of course we will reuse those rockets, it would be insane to not do so". But then as time pressure set in & money was suddenly not a problem, all that went to the wayside. And by the time Apollo was over, it seems the mindset that rockets are expensive and expandable set in. If it was just inertia or also business interests of the by then entrenched launcher contractors is hard to tell.