It is unfortunate that US companies and US nuclear engineers were not on the forefront of developing these reactors.
“I’ve been hoping that someone has been doing serious work on pebble bed reactors. They are the future of nuclear power. Until they are replaced by fusion reactors someday.”
Actually Liquid Fueled Reactors are probably the future of fission power, especially since the can use thorium as well as uranium.
Personally, I’m hoping LENR works out, that would be better than fusion.