Staying that as a genuine question since I'm not sure how the math works out at that scale, you have to weigh that against hardware depreciation of course.
Power purchase agreements are priced differently and usually written to guarantee power at a predictable price, think of it like reserved instances and spot on the cloud. Bulk of workloads don’t care or benefit from spot pricing.
Also Modern neoclouds have captive non grid sources like gas or diesel plants for which grid demand has no impact to cost. These sources are not cheap but DC operators have not much choice as getting grid capacity takes years . Even gas turbines are difficult to procure these days so we hear of funky sources like jet engines.
It’s not like when you ask GPT a question, the energy grid takes a dip. No, data centers have massive power draw. They also have battery backup systems that are the primary drivers of stable power along with power inverters and all sorts of power equipment on site. The fact that we are building out more data centers means we need more power. The energy marketplace has only so much extra capacity (various forms) before it too is depleted. So, you bring on more power plants, more reactors, more solar farms, moar powah!
No, what is sad is that we have the ability to turn every roof, every window, every side wall into a power source and yet we choose not to.
(I wrote a demand response energy grid “manipulation” platform)
If it's a stable 24x7 load it would be ideal for nuclear energy, low carbon, but slow to adapt to changes in demand.