The situation with HDMI is confusing enough without also introducting USB-C into the picture. A lot of video cards and some monitors will negotiate a DisplayPo

The situation with HDMI is confusing enough without also introducting USB-C into the picture. A lot of video cards and some monitors will negotiate a DisplayPort link over HDMI ports and HDMI cables. For instance, my Intel NUC has only a single HDMI port, but plug a HDMI to DisplayPort cable in, and it'll negotiate a DisplayPort 1.2 connection to my Dell U2711 at 2560x1440@60hz. Plug a HDMI to HDMI cable in, and plug into the HDMI port on the same monitor - no bueno, it's HDMI only and we're stuck at 1920x1200. Another monitor, I forget the brand, was happy to negotiate DisplayPort over a HDMI port. Introducing USB-C adapters into the mix and some adapters appear to support USB-C Alternate Mode to carry DisplayPort but only have HDMI connectors, others won't. Then we run into potential issues where the video card's outputs may not have been wired into the USB-C controller. Though this afaict is mostly applicable to desktops with discrete GPUs.