My computers and network are powered by uninterruptible power supplies (UPS) which I highly recommend for every important system. I have a generator in case of extended outage, which I also highly recommend to everyone who is able to have one at home, regardless of whether you own a computer.
I personally have fiber, cable, and LTE feeding my home gateway. This might seem like overkill to non-tech folks, but I recommend it to anyone whose productivity/career is highly reliant on being online.
I realize this isn’t necessarily a typical home setup, but I also think most people are horribly unprepared for many potential situations.
This isn’t a claim that I have zero downtime at home. It’s only to say that if my Bitcoin node is offline then any hope of relying on fiat banking was abandoned much earlier.