It's nuclear fission. It's always been nuclear fission (well, at least since the '50s) and it will continue to be until we commercialize fusion reactors. Everything else is nice to have but it's like NIH syndrome.
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Maybe SMR's, thorium, 4th gen, etc will work out, but maybe not.
The EU also forgot how to build airports and train stations on budget and on time.
Should we stop building airports and train stations?
As for nuclear power plants: Germany and France built most of their reactors on budget and on time.