TIL some devices will not power with USB C to C. Apparently, USB-PD is a requirement for USB-C ports to even provide 5V. If the device doesn't use it, no power. Even on a laptop which USB-C ports are only capable of 5V, where USB-PD makes no sense.
For nearly 20 years, OS X stuck to version 10. That changed a little under 3 years ago, but they kept calling it OS X anyway. The name made perfect sense. Apple, why ruin it now?