Also, any country in a potentially unstable region will be looking very closely at the current Ukraine war when considering fission plants. Look at how many close calls, near disasters, and potential outright blackmail Ukraine has had to deal with from its fission plants. Both sides have accused each other of planning to use them as dirty bombs. And, as a precaution, all the Ukrainian nuclear plants have been taken offline.

It's all well and good to design a fifth generation reactor with automatic safety features that rely on the laws of physics alone for safety. Your molten salt reactor still ends up as a puddle of radioactive ooze on the ground if someone blows it up, and your pebble bed reactor turns into radioactive grapeshot if someone lobs a bunker-busting bomb right through your containment dome.

These aren't things engineers typically consider, but they are things nations have to consider. Add to this that a distributed grid based on lots of solar, wind, and batteries is much more resilient to artillery and missile attacks. If a nation is entirely powered by rooftop turbines and solar, the only way to cut off their power is to destroy every one of their buildings. And at that point, even the most fortified nuclear plant is irrelevant, as they have no customers left to deliver power to.