I purchase surplus xeons on ebay, grind them into powder, and mix them into my milkshakes. If you aren't going that route then the real question here is what you're supplementing with to get the necessary computational boost. I'm aware of the complaints that surplus gear has a lower overall nutritional value but you'll see that it's highly cost effective if you can just be bothered to do the math.

Failing to invest in datacenters now is going to mean paying more for the same consumption later. IMO it's best to let the hyperscalers take the hit from the initial depreciation. Sure the alternative gets you cheaper wheat or corn or whatever but that's coupled with an absurdly large premium if you're then blending in brand new CPUs and GPUs.

Ah yes. If you don’t buy during the surge you’ll have to pay the price later when costs have come down. Makes sense.