My startup is trying to develop wafer scale integration where you collapse 2 racks of the network, metal boxes, power and cooling into a 300mm wafer immersed a 100 mm x 400mm box with a few fibers and three power cables coming out. That can save around 900% of the capital cost and orders of magnitude of power (especially if you put the box in a building where the waste heat is not wasted but used to heat water for showering and space heating).

As it is now, these datacenter customers and hyperscalers don't seem to care about the enormous waste and cost of paying for inefficient hardware. Considering the enormous cost and carbon emmission savings a wafer scale integration would bring (and the competitive advantage), you would be suprised how hard it is to get funding from them to develop it.

I suspect is also the main reason they don't care to publish normalized benchmarks for $/performance/joule, as it would demonstrate how wasteful it all is.