A few things to keep in mind. First is that nobody has written a mesh protocol on top of LoRa. The second is that data rates drop off quickly.
If it were cheap enough it may be worth incorporating for emergency alerts and texts to emergency service when everything else is down. They way the radio protocol is designed is to funnel a lot of little bits of data from many different points (hundreds, thousands), and send back some sort of instruction or confirmation. Which is great for say co-ordinating solar inverters and battery banks, but the host nodes really needs fatter data pipes to talk to each other. So the self-healing isn’t really there.