iPhone grrrr
Okay, so, here’s the error which caused me to downgrade to my iPhone 6s:

This was only happening on the XR, though (not on my iPod Touch, iPod Classic, or either iPad), and my iPhone 6S was working just fine.
Today I was actually pretty pleased with using the iPhone 6S and generally liking it better than the XR for the reasons I thought I would – it’s smaller, lighter, less obtrusive, and frankly less annoying to deal with overall. So I decided I’d buy a new battery for it and try my hand at that, since it doesn’t seem all that hard after all (and all of the battery cases I could find had critical problems like being too big or heavy or having connector failure or catching on fire).