Having two distinct routers and physical devices just isolates each network that much more. A single device is still exactly that at some point, and in such ca

Having two distinct routers and physical devices just isolates each network that much more. A single device is still exactly that at some point, and in such cases there is always the possibility of an exploit that could compromise the device fundamentally. I think the author is just advocating for a very locked down approach but I agree it is not feasible for most folks.