The gas turbines are hopefully an intermediate solution due to the long and not guaranteed process of grid connection and renewable buildout. History is of course full of such bets that did not work out the way their proponents hoped.

> The data centers are being built, sorry to anyone who gets triggered by that.

It's obvious that you're starting from your conclusion and working backwards, which is probably how your initial comment was full of so much motivated reasoning to begin with.

In your mind, is there any set of negative externalities that would justify not building the data centers, or at least not building them now, or at least not building them now in specific areas that require these types of interim solutions?

This is exactly right. These are glorified emergency generators, and grid power is ordinarily far cheaper; especially for interruptible loads like training new models (checkpointing work in progress and resuming it later is cheap and easy). The article mentions that quite clearly.