Everyone has their own comfort level with risk and redundancy. As is likely true for many others, I did quite a bit of round dial IFR in decades past--no autopilot; backup to a vacuum failure was needle/ball/airpseed and a whiskey compass; no in-cockpit Wx (remember when center's response to a Wx question was that their radar didn't paint Wx? The workaround was to ask them to press the Wx1 and Wx2 buttons on the side of their console and describe the "slashes and Xs" displayed along my route of flight). Not interested in going back to those days, e.g. I will no longer launch on a single pilot IFR flight without a functioning AP to reduce workload, but...
When I bought my -10, it had one battery and one alternator. Adding a B&C standby alternator seemed like a particularly good idea given the electrical dependency, and I did that. I've seen other posts describing much more redundancy and failure protection. If I were building, I might well pirate many if not all of those e-system design features.
I chose a Stratux ($200 version of a Stratus) and an iPad as my backup. I use FlyQ rather than ForeFlight, but that's just a matter of preference. I have a TruTrak AP, so if it were just the glass that failed, the AP would still fly a course, hold altitude, do climbs/descents, etc... However, if I had to shut the electrical system down entirely, the stratux and iPad would still be running as they are completely independent. I mounted the stratux on the cross bar behind the rear seats with a velcro strap. It's "solid" but I added a "gyro reset" to my cruise checklist anyway. Most of my flying is in the SW. Hot is an understatement. My iPad (full size) is mounted to the center post using RAM components (motorcycle handlebar clamp, a short extension, and what IIRC is called an X-grip). It's also my ADS-B-in solution as well as my moving map, approach plate source, etc..., so I use it every flight. The mounting location doesn't require head movement to reference it. In 3 years, I've not had an overheat or a disconnect. Granted, the -10 doesn't have a clear canopy, but it's bathed in sunlight though the windscreen. If the iPad were to overheat, I've got an iPhone in my pocket that could be running the FlyQ app within 30 seconds. I power the stratux from a 20,000 mA-h power pack. I place the power pack on top of the tunnel between the two front seats, and keep a spare ready to go should it be needed. Change out is quick and easy. A 10' cable is adequate to keep it routed "out of harm's way".
Using split screen mode (PFD and a geo-referenced plate) I've flown practice approaches with the iPad alone as a reference. It's crude compared to fully operational glass suite, but amazingly good v what an electrical failure would have left me with in the old days.