So you have found docs for the Broadcom SoCs on the Pi without NDA? That would be newsworthy. The ethernet controller lives in the SoC btw, and talks to a phy

So you have found docs for the Broadcom SoCs on the Pi without NDA? That would be newsworthy. The ethernet controller lives in the SoC btw, and talks to a phy. That's another boardcom chip. See if you can find a datasheet for BCM54210. The Pi is not open hardware, even the schematic is a joke. Broadcom is another way to spell "NDA" and "no docs for plebs." I don't know about price but you absolutely can find Mini-ITX (and smaller) Intel based systems that idle at 5-15 watts and perform better than the Pi. At $200 for the cluster board, $40 for the adapters, and ~$50 a pop times 4 for the CM4s, we're talking $400-$500 and that's not far off from the price of some of these low end x86-64 systems that -- yess -- are much faster than the Pi 4.