Comment by myrmidon

Just to be clear: I'm not accusing Helion of being dishonest or even fraudulent.

It's just that from everything I know about the project, they still have a long way to go, and there are a lot of milestones to hit that are just pipe dreams for now (actually fusing He3, breeding it, net-gain energy extraction, ...).

I would expect progress to slow down significantly as the scale of prototypes and their complexity increases (like what happens for basically every engineering project ever)-- but progress is already slow/behind schedule to begin with...