Only thing I can think of is they’re holding out for fusion, but that’s probably a long ways off still. Probably longer than the lifespan of any fission reactor built this decade.
Right...I have always thought that fusion would be the way to go, but I get the impression is it dependent on some technology breakthrough that has not yet arrived or fully arrived, such as room-temperature superconductors or something along those lines.
Fusion always seems to be “Ten years away”...