Lots of R&D uses deuterium, the neutron output is lower-energy and a handy diagnostic. Even hobbyists with fusors run on deuterium. Getting net power with deute

Lots of R&D uses deuterium, the neutron output is lower-energy and a handy diagnostic. Even hobbyists with fusors run on deuterium. Getting net power with deuterium is harder than D-T, but just fusing some deuterium isn't hard. The same goes for aneutronic fuels, as long as you reach the necessary temperature. Helion for example claims to have achieved a significant amount of D-He3 reactions. LPPFusion has published research saying they've achieved boron fusion temperatures, though not with boron fuel, or the triple product needed for net power from boron. (They're using deuterium though, and getting neutrons.)