Spending so much time looking for good routers for OpenWRT, or SBCs with multiple Gigabit Ethernet has got me wondering "How hard would it be to modifiy the Raspberry Pi 4 circuitboard to add another ethernet controller....".
But modify the board i mean, can I open it in KiCAD and make enough naive guesses to swap the USB controller for an ethernet one. I read that they're both on the secret PCI-3 bus.
@jookia Oh you're right!
The schematic documents that I thought would contain the board layouts does not 😭