My only explanation for the long development time is that the mainstream science rejected it because it doesn’t fit any known nuclear model. This is the same mainstream science that says AGW is not open to debate. I will be reading up on Pons and Fleischmann from the original cold fusion days in the ‘70’s. Science is not supposed to be run like the Inquisition with non-believers discredited/disgraced by those in power.I haven’t made up my mind yet, but I don’t trust mainstream anything anymore.
If it is a viable source of energy a revolutionary product would have been introduced long ago.
You don't need the permission of "mainstream science" to build something that works. You just have to have a technology that works.