Upstream didn't disappear, it moved to be more open.
It's businesses freeloading from Red Hat by trying to be bug for bug compatible to take advantage of certifications and undercutting them on price that have issues, and are driving the narrative.
I suggest reading:
https://www.lpi.org/blog/2023/07/30/ibm-red-hat-and-free-software-an-old-maddogs-view/