It's a symptom of the elephant in the room...
Someone noted that it's easier- in theory- to upgrade or replace the equipment in an AI data centre, but the amount of power available is likely to be fixed once a data centre is built. Well, maybe.
I've posted most of this before, but I think the gigawatt-based metric is also symptomatic of something else. Something that even its opponents have give bizarrely little attention despite it being easily the biggest and most fundamental difference between the LLM AI boom and previous computer-driven revolutions.
It's the fact that the exponential increase in AI capacity in recent years has been predominantly driven by simply throwing similarly-increasing amounts of money and hardware at the problem- until we reached the current eyewatering levels- rather than the far more modest improvements in the underlying technology. In other words, brute force.
This is fundamentally different to what made the *original* computer revolution- from the end of WW2 to the present day- possible. That *was* driven almost entirely by such improvements in the underlying technology- those that Moore's law described. Exponential decreases in costs and scale of manufacture, coupled with the exponential increases in computing power they enabled.
There's no way this would have happened simply by building increasing numbers and bigger versions of those early valve/tube-based computer designs. There might have been a limited computer revolution of sorts (maybe with several computers in primitive "data centre"-like buildings per town), but you can only scale that "brute force" approach- and valve manufacturing- up so far before the cost and practicalities become prohibitive.
And the problem is that primitive "brute force" approach *is* the one that the current AI companies are relying upon.
Which is an issue because we're already clearly near the limits- the current bubble is *already* consuming ludicrous amounts of investment and it's just not likely to go *that* much higher.
And, to get back to the original point, the use of "gigawatt" as a crude synonym for computing power is a giveaway of this approach. Much like it would be in the "alternate future" described above, where the power of your local valve/tube-based computer was broadly proportionate to the amount of electricity it gobbled up.