[eesmith]

But the quip that "fusion is always 10 years away" is not an expression that no progress is being made. Rather, it's an expression that the most optimistic views for fusion are always for at least 10 years in future, and as we get more understanding of the difficulty, that horizon always stays 10 years away.

I've been following fusion from the sidelines since I first read about it in SciAm in the 1980s.

I think that understanding how the human body (or any complex biological system) works is a more complex project.