There are companies and research groups in a number of countries currently experimenting with next generation fusion devices which have a new class of supercond

There are companies and research groups in a number of countries currently experimenting with next generation fusion devices which have a new class of superconductor in them as compared to ITER (in essence, they run at a higher cryogenic temperature so need less exotic refrigeration to operate). None have as yet proved their work to be commercially viable (to my knowledge) but there is real work being done.