Encountering an irritating number of devices that are charged/powered via a USB-C port but that don’t work with a USB-C pd charger (only with a USB-C to USB-A cable).
Bonus irritation: a device with a USB-C port that works with a PD charger only if the cable is plugged in one orientation, but will work in either orientation if connected to a USB-A charger. (A Phillips rechargeable pocket work light).
@jef@mattblaze I was thinking of the many flavors of RS-232 and RS-422 but I think you've topped that with TIFF which more fully embraces the principle of appearing to be compatible (often falsely) and not always even being aimed at the same purpose.