I agree it's good that the article is not hyping up the idea that the world will now definitely be saved by fusion and so we can all therefore go on consuming all the energy we want.
There are still some sloppy things about the article that disappoint me though...
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They seem to be implying that 500 TW is obviously much larger than 2.1 MJ... but without knowing how long the 500 TW is required for, this comparison is meaningless.
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They imply that using more power than available from the grid is infeasible, but it evidently isn't as they've done it multiple times - presumably by charging up local energy storage and releasing it quickly. Scaling this up is obviously a challenge though.
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The weird mix of metric prefixes (mega) and standard numbers (trillions) in a single sentence is a bit triggering - that might just be me though.
The real question is why did they install a system based on 5.25" floppy disks in 1998 in the first place!?
The 5.25" floppy was surpassed by the 3.5" floppy by 1988 - ten years prior to this systems installation - and by 1998 most new software was being distributed on CD-ROM. So by my reckoning, in 1998 they installed a 'new' system based on hardware that was 1.5 generations out-of-date and haven't updated it in the 26 years since.