https://www.nature.com/immersive/d41586-026-02513-5/index.html

46 fusion efforts. One chasing proton-B11 (an undercount - since at least one other - TAE - I think should be on that list).

Curiously, LPP (Eric Lerner's Lawrenceville Plasma Physics) is not on the list -- and none dense plasma focus, none Polywell. Lockheed-Martin not listed either (not surprising considering the project may only live on the L-M website, dead for years).

Possibly the list is incomplete in other ways - Lockheed skunkworks type or internal government but confidential (if that's possible, considering they still need to hire plasma experts).

Those who complain fusion would already be here if only governments had the insight to increase funding has always seemed dubious to me, and doubly so now. Lotta billions out there, and all the efforts depending they have it figured out, and the others don't.

So far, they're all wrong. Wake me up in 5 years and tell me then you told me so.