Sigma wrote: Most of the companies above have been stalled due to lack of funds. If there were to be a renewed interest in fusion, with say the Fusion X-prize, these companies may get the funding they need to complete their technologies. Personally I hope all the fusion technologies make it on the market, I’m sure they will each fill a niche.
I think once one approach is successful, other approaches will have a lot of problems getting funding. Particularly if they are inherently more expensive to begin with. So the first technology to cross the finish line will have exclusivity for a long time.