Agreed, though the question of how much funding do we give to each of the current promising-seeming approaches is a difficult one. Going all-in on a single appr

Agreed, though the question of how much funding do we give to each of the current promising-seeming approaches is a difficult one. Going all-in on a single approach would be very risky, but spreading the funding so thinly that no approach succeeds would also be a mistake. My personal choice would be to give SPARC (a tokamak design, somewhat smaller than ITER since it would use better superconductors to produce the magnetic field) and magnetized target fusion (see General Fusion for a company that is doing this) enough funding that they can produce working reactor prototypes as fast as possible. Spread the remaining money across a few other promising approaches. I'd even give some small amount to super-risky "tabletop fusion" experiments, just because it's fairly low cost.