Comment by kaoD

Just a guess but I assume that this is (or rather, would be, judging by the README this isn't past the planning stage) for IoT and the like.

If you want your device to connect to a VPN you need something to implement the protocol. Cycles are precious in the embedded world so you don't want to do it in your microcontroller. You might offload it to another uC in your design but at that point it might make sense to just use an FPGA and have this at the hardware(-ish) level.

You can think of this as a "network interface chip" but speaking Wireguard instead of plain IP.