Top of this list used to be particular versions of Ubuntu
Summary: GNU/Linux "market share" in Steam grew by a quarter this past year, boosted by SteamOS perhaps, but watch the trends in distributions; even the Ubuntu-based distros aren't near the top (and SteamOS moved from Debian to Arch, so expect Ubuntu to stagnate further)
Alyssa Rosenzweig is the graphics witch behind the reverse-engineered drivers for the Apple GPU. She previously led Panfrost, the free drivers for Arm Mali GPUs powering devices like the Pinebook Pro. She graduated in 2023 with a Computer Science degree from the University of Toronto and now writes free software full-time.
Now we have a project started primarily by Red Hat (and managed by Microsoft GitHub, which is proprietary) being managed by Microsoft and primarily serving Microsoft and IBM