How about routers (and IoT devices for that matter) that have a ROM image, with a user intitiated ability to actually obliterate the entire contents of NVRAM an

How about routers (and IoT devices for that matter) that have a ROM image, with a user intitiated ability to actually obliterate the entire contents of NVRAM and flash? i.e. the firmware (which is made up of various parts, multiple stage bootloader, kernel, initrd, root, NVRAM, maybe proprietary radio firmware and/or baseband files) would be wiped out. The ROM would have a very limited ability to "phone home" only via wired connection, and get an updated firmware payload. Obviously the idea is to make sure the image in ROM is simple enough that it's really damn unlikely that it can be attacked, or attacked before the correct and intended firmware is downloaded and installed.