None of the linked articles even mention Feynman's name.
Why should they? Not many current astrophysics papers mention Galileo, either. Nor do most papers in modern computing reference the work of John von Neumann.
In science, an original idea or suggestion by someone, no matter how famous, is built upon by others, who's work is built upon by others, until someone actually turns an incomplete idea into a field of study. And by this time the literature has evolved to view the problem slightly differently, perhaps more completely, perhaps from a point of view that's more useful from a research point of view. And then these papers by the others who made these changes become the ones that are referenced. It's the cycle of scientific research. And don't think it's because we've forgotten our roots... If you asked the author of this paper, I'm pretty sure he'd start with either Shannon or Feynmann. We leave older references off, because, often it's not relevant to the research you're talking about. And, frankly, your space is already so limited you don't want to spend any on name checks.
But come on, do you really think a 55 year old paper is going to be at the top of impact rankings when computed against current research in a field moving this fast? And, even if so, isn't it more likely this work has been superseded by others? IT'S BEEN 55 GOD DAMN YEARS, FOR CHRISSAKE!!! I think your hero worship is showing. At least find a more modern reference.