(Confusingly, USB C is a connector, not a protocol or set of protocols. But the use of a USB C connector hints are supporting modern protocols.)
From: Lennart Sorensen via Talk <talk@lists.gtalug.org>
I guess the days of proprietary power supplies might actually be numbered.
Not exactly. There are so many PD specs that you need to make sure that your power supply conforms to one that will feed your computer enough power. PD 3.2 is the latest in this article: <https://en.wikipedia.org/wiki/USB_hardware#USB_Power_Delivery> Note: not all USB C cables support all PD modes. And then there are proprietary extensions to PD -- Qualcomm QC, for example. <https://en.wikipedia.org/wiki/USB_hardware#Faster-charging_standards> So: we went from a stupid diversity of connectors, easily visible, to an almost invisible set of compatibility requirements. I think that they are safe: mistakes won't catch fire.