Good thing about the setup and self updating router is you should have a VPN/(head/tail)scale connection enabled to it so you can still use the smart plug (plugged into the UPS) or send the WoL packet. Or PiKVM. Or if your breaker box is outside ask your neighbor to flip some switches until it comes back to life and come back to an online server and a fridge full of spoiled food.
Burry me with my ERA