> Apple used an "alternative OS" for their Airport routers: NetBSD. Kernel was around 6.x if I recall correctly. Seemed like Wi-Fi worked preety good, maybe eve

> Apple used an "alternative OS" for their Airport routers: NetBSD. Kernel was around 6.x if I recall correctly. Seemed like Wi-Fi worked preety good, maybe even "flawlessly". That’s a nice strawman you got here. AirPort routers shipped with NetBSD, and it was officially supported. But good luck getting macOS to run on that — macOS would count as the “alternative OS” for the AirPort.