> But given that a home server can run on 10W of electrical power, and potentially off of a solar panel I found this unpersuasive. I didn't have any quantitative estimates then, and still don't now. However, it's likely that a world in which there is one server per household or per street would be more electrically efficient than the current world of billionaire cloud servers.

Sorry, but I don't buy it. DCs are frequently powered by solar (https://www.google.com/about/datacenters/renewable/, https://sustainability.fb.com/innovation-for-our-world/susta...), and this article gives no actual evidence other than home server being able to run on 10W. Solar and Wind projects are successful in part because of economies of scale. While local-scale grids may be great, using them to power services that run on cloud infrastructure today don't seem like a wonderful application.

I have no doubt that the aggregate sum of my all of my cloud usage across Google, FB, Amazon, etc. amounts to larger than 10W, but if you summed up all of the different pieces of those services that I use, I doubt you'd ever be able to scale them all down to something that could run at home, forget doing it on 10W. There may be a small sliver of that which is possible (e.g. EMail), but the fact of the matter is that it's almost irrelevant.

Coincidentally, the author of this post maintains a project that develops a home server system, which means there's plenty of vested interest in pushing this non-analysis.