For those that were able to read my post before:
Deals with two ESP8266 units being inaccessible after a 10 min long power outage yesterday morning.
One looped on exceptions (lab unit) and the other was not on-line even though I cycled power to it (it is deplyed in the attic). I assumed both suffered the same problem.
Removing body of post because I was wrong in assuming both units had the same problem.
The debug unit did loop into exceptions but the deployed unit in the attic actually just switched to WiFi AP mode since the main network was not accessible when power came back.
The main ASUS WiFi router is much slower recovering from a power glitch so the WiFi network was not present when the ESP device powered up and so it set itself to AP mode for configuration...
And my lab unit had to be erased with esptool and reloaded with new firmware, so that was actually hit by what happened. But after reload with the proper esptool settings it seems now to be OK.