It's a good thing I'm a hobbyist so that I can avoi- hmm, now that I think about it this feature could be really cool and shouldn't take too long to implement...
Spouse at 7:00 AM: "Why do only some of the house lights work and there's no hot water?"
Me: "You know that quick fix I was working on last night. Well, umm, one thing led to another aaaand... Umm... Just so you know, your phone is using mobile data because the wifi is out."