My estimate was a pessimistic one. I would be SHOCKED if they are available this decade, looking at the fact that not a single one has positive net generation (this is just net thermal heat generation, AKA amount of heat put into the system and amount of heat out of the system). On top of that, current fission plants take over a decade to setup.

I'd also posit that a return on investment in a company like this isn't only going to happen if it achieves its goal. Looking at how research intensive/cutting edge the end goal is, they could stumble across 100 different new innovations in the process that could sprout into their own business ideas.

PS. Am I the only one who thinks this page sucks? https://www.helionenergy.com/our-technology/