[pfdietz]

ITER may deliver something tangible, but also something that is not on any realistic path to being competitive. It's far too large for the power it (or DEMO) would produce.

It's also possible ITER will just deliver a negative outcome, if they can't figure out how to control disruptions sufficiently. A reactor that violently breaks itself is not something anyone would want to buy.

[willis936]

The primary reason for this is the use of Nb3Sn LTS confinement coils. REBCO is the next wave.

[pfdietz]

ITER has volumetric power density 400x worse than a PWR reactor vessel. ARC as described in the arxiv paper is just 40x worse. Better, but not by enough.