Hoping I'm wrong, but I've been looking into what server/embedded platform has the highest number of CPU/HSIO-lanes per watt and is the answer really still the Intel Atom C3000 range from 2017?

This is mainly due to my living in an area with expensive electricity prices, but it feels insane to me that you can't build at least a relatively power-efficient NAS with ECC and out of band management using parts from this decade because of AMD & Intel's market-segmentation bullshit (also because ARM fucking sucks).