In 2025 they got a 313% gain (4.13 output factor).
Fusion is actually here and working. It’s not cost effective yet but to pretend there has been no progress or achievements is fundamentally false.
Fusion News, May 28th, 2025 https://www.youtube.com/watch?v=1YHcI-SfKx8
Nothing to do with cost, we can not build a fusion reactor in 2025 with any amount of money that will produce more energy and goes into it.