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.
Not everything you don’t like is a bot. I learned something new today that DP supports audio and feel a bit foolish for not knowing that before now, though I stand by my personal experience with the connector. Between work and home, it’s always the DP that flicker at the slightest tap.