I find this take overly optimistic. First, it's bases on the assumption that the training will stop, and that energy will be available for other, more useful, purposes. This is not guarantees. Besides this, it completely disregards the fact that today, tomorrow, energy will be utilized. We will keep emitting co2 for sure, and maybe, in the future, this will cause a surplus of energy? It's a bet I wouldn't take, even because LLMs need lots of energy to run as well as for training.

But in any case, I wouldn't want Microsoft, Google, Amazon and OpenAI to be the ones owning the energetic infrastructure in the future, and if we realize, collectively, that building renewable sources is what er need, we should simply tax them and use that wealth to build collective resources.