Perhaps, but that's not an indictment of Feynman, but an indictment of how you get a PhD nowadays. Today you get a PhD for something rigorous and technical and

Perhaps, but that's not an indictment of Feynman, but an indictment of how you get a PhD nowadays. Today you get a PhD for something rigorous and technical and ultimately irrelevant compared to Feynman diagrams and path integrals.