> there is a rather pro-nuclear crowd on HN here that does not understand enough of the physics and the systems engineering of the large scale electrical grid

Regulatory capture and what's essentially corruption is not "physics and systems engineering", and they should be considered independently of nuclear power's inherent technical merit. And regarding ramp-ups and ramp-downs, I have never heard of anyone suggesting nuclear power for anything other than base load, so I don't see how this would be an issue?