Nuclear energy is and always will be the solution. It was 100 years ago, when the physics understood it. It was 80 years ago, when the devastation of nuclear bombs were understood. It was 30 years ago when Gen III+ reactors were proposed and began building, with passive safety features.
And it is today, when in the midst of climate oblivion, people are still rolling around debating base-load energy sources that physicists 100 years ago solved.
In regards to cost overruns and politics? You’d think we’d figure it out in the face of destruction. Optimize every aspect of it. A neutron reaction will always have orders of magnitude higher energy than photons on a solar panel. End of the day, we either use physics to our advantage or get gobbled up by it.