What is it with framing this in terms of nuclear power. Many of the nuclear plants are being shut down because they are either end-of-life or were recently shut down because they were uneconomical.

Sure we can argue that we were not prepared for the recent uptick in energy demand as well as exceptionally low wind last year. However, one can just as well argue that this was a failure not to build more wind and solar capacity.

The bigger issue is that nobody wants to build nuclear power without massive subsidies, because it is simply not economical. So shouting now, "you should have build more plants" is easy, but that would have meant higher electricity prices, because that's what would be needed to economically run nuclear power.