Interesting illustration of the notion that the sun comes out reliably and that intermittency is a very local and seasonal effect. The aggregate power is reliable and predictable enough to host stuff and survive a little attention from Hacker News. It would be interesting to track the aggregate KWH used and correlate it with traffic.

Of course as practical thing this is not that important. Most big cloud providers are pretty far done transitioning to data centers that are powered sustainably. It will take another few years to complete this globally. E.g. Amazon is looking to use 100% renewable power by 2025.