Yes, hardware is known good on both original Google OS and even Firefox OS. After install of this CM13 SFOS, Wifi is hosed.

But even more interesting, I've now reflashed (fastboot flash) boot/bootloader/radio/userdata/cache/system/recovery back to that same FxOS (the one which worked) and now its Wifi is hosed, too.

So what does that leave? My memory is there a /persist with stuff which survives all of this? Is there some content there which the install has stepped upon? I looked in there and wifi/.macaddr seems OK, is there some other files which SFOS has messed with?