And how many of those probes required entirely new rocket technology, instead of being launched on top of a system designed decades ago to launch ICBMs? Probes

And how many of those probes required entirely new rocket technology, instead of being launched on top of a system designed decades ago to launch ICBMs? Probes are nice for science, but they really don't inspire people the way manned flights, space stations, etc. do. Nor do they require nearly as many resources; they comparatively cheap and simple. The resources poured into Apollo were enormous, and the technologies derived were hugely significant. What technologies were derived from New Horizons? Probably none. I'm not saying it shouldn't have been launched; it was absolutely a worthy project. But it just doesn't compare to Apollo in any way. So as I said before: "nothing as notable".