75W idle is 650kWh a year, that's quite significant in the context of a home.

Well, a Synology NAS would probably consume like 30-40w, so we are talking about an excess of $70-100 a year where I live. Depends on one's budget of course, but not really a big deal for me. And certainly less than what I am saving on the upfront cost.

260 Euros in Germany. And this heat also has to be moved out

Well that’s on you for living in the failed state of Germany, where power is 3-4x as expensive as it is in sensible countries like the US.

It's frustrating when a comment is both needlessly belligerent flamebait AND wrong about electricity prices in the US. I guess that's what makes effective flamebait

German electricity prices are around €0.38/kwh based on my quick googling which is roughly $0.44/kwh. I pay $0.12-0.13/kwh in the US so I’m at least right factually up to rounding.

Wrong. I pay €0,23/kWh, so do your homework.

What exactly is failing in Germany, and why is it important in this context?

They have failed to have a sensible industrial and energy policy, leading to around net 0 GDP growth since 2019. I’m sure for the degrowth elites though this is not a failure it is working as intended.