We already have enough experience that makes ITER obsolete. Newer designs will have a much thinner central column and stronger magnets, resulting in much bette

We already have enough experience that makes ITER obsolete. Newer designs will have a much thinner central column and stronger magnets, resulting in much better confinement. And high-temperature superconductors will an order of magnitude cheaper. Right now, ITER is still needed to get information on plasma properties at the temperatures required for fusion.