@lxo @jas @amszmidt @redstarfish @conservancy A free software low-power router really isn't hard if you're going so far to make a custom board design - you just select a decent SoC like the QCA9531 and then you have 100BASE-TX and 802.11n; https://www.thinkpenguin.com/gnu-linux/free-software-wireless-n-mini-vpn-router-v3-tpe-r1300 (LibreCMC and not the proprietary "Open"WRT too).

Alternately, you could select a SoC with free drivers that implements 1000BASE-T and/or PCIe and then include a mPCIe or PCIe slot, which a freedom-respecting and GPLv2-compliant 802.11n card can be inserted (of course that would give the user the freedom to replace the card with whatever they want).

I already had a full GNUbooted server with 2 1000BASE-T ports, so I just made that the router and put a Qualcomm Atheros AR928X card in to get Wi-Fi, rather than getting a separate router (routing performance is negligibly improved as there's one less hop and you can get IPv4 without NAT).