HDMI Forum is unwilling to disclose the 2.1 specification for open-source (Linux): according to AMD, they had submitted a functional, HDMI 2.1-compatible driver , which the Forum rejected.
The problem is not with monitors, but rather TVs, which are not using DP (almost?) at all
Mozilla’s Betrayal of Open Source: Google’s Gemini AI is Overwriting Volunteer Work on Support Mozilla
Something around $500M and $600M yearly. And it's around 90% of all Mozilla revenue