The HDMI Forum, responsible for the HDMI specification, continues to stonewall open source. Valve’s Steam Machine theoretically supports HDMI 2.1, but the mini-PC is software-limited to HDMI 2.0. As a result, more than 60 frames per second at 4K resolution are only possible with limitations.



But again that’s not related to a committee stopping the implementation of a standard. It’s a scale of production issue, a labelling issue, and a consumer protection issue.
And I like having one port to just dock my machine in for power and display. I do understand how a separate port can help but I don’t see why we can’t have USB C working to its designed spec apart from the reasons I listed above.