It's funny that i hear "first time nuclear fusion experiment produced more energy than it required" every few years. Did a quick google search and there are numerous articles claiming it, even one from 2014. Though that experiment had less margin (the newest one was around 20% more output than input, the 2014 one was much smaller increase), it still was technically more output than input-so the new one is not 'the first time'. And there were others every few years claiming the same.