and there are advances in nuclear fuel design such as Westinghouse/Toshiba's annular fuel design that significantly improves burn up and Thorium Power's drop in replacement that will allow current LWRs to utilize Thorium and waste Pu to produce energy with lower waste produced and proliferation resistance.
Dodo bird? The HPG is the size of a hot tub, can provide power where alternative energy such as wind and solar are not practical. They already have a 2.5 Billion dollar backlog of orders! But...like any other really good promising future technology, it is not available for the public to invest in, already has more than enough money for funding from "private investors."