I’m aware of this and have been mentioning this caveat to friends who got over-excited. It’s actually even worse than you say because this form of fusion, compression with lasers, seems more complicated than magnetic confinement and will be harder to scale up. You have to keep replacing that deuterium pellet and you have to do it fast with alot of lasers all working together perfectly.
Further, no other lab has been able to reproduce the National Ignition Facility’s past successes because what they’re doing is so tricky. Reproducibility is kind of a big deal in science (at least it’s supposed to be).
But all of that is not to say it wasn’t a breakthrough, it’s just to say that the hype is a overstated. This was a milestone no other effort had reached before, even with the caveat of only measuring the energy input at the point of reaction. So it’s progress. Taking multiple approaches is also a good way to proceed. If everyone just chants ‘Tokamak’ over and over again, or even ‘Stellerator’, you get less innovation.
Fusion is probably half a century away from commercial reality. And I think that’s the OPTIMISTIC end of the time frame. It’s still worth doing because the math and physics checks out. This CAN work. This isn’t like Cold Fusion or Zero Point vacuum energy which are scam science. But it’s going to take alot of time and money to get there. But when we do, fusion is going to blow the competition away because the amount of power means that even a tenth of a percent improvement in yield will produce oodles more power.
I’m skeptical that wind and solar can practically become the backbone of a global energy economy. I think fusion is 50–100 years away. I think we need medium term solutions to produce reliable base load power. Fission and geothermal are those answers.