You're confusing MW with MWh. Older DCs did indeed consume on the order of 1MW of continuous power, like the one at [0]. The 2012-dated DC at [1] has a redundant 22kW power feed per 42U rack, so that's ~500W per RU - which for most pre-AI servers was plenty.

With hyperscalers it of course went a bit beyond that due to the sheer number of racks, but 100MW would've been considered huge.

[0]: https://www.northcdatacenters.com/en/northc-datacenters/delf...

[1]: https://www.eurofiber.com/en-nl/data-centers-netherlands/dat...