If you actually read that page, you’d realize that “Requirements” is a misnomer, or at least misleading, page title for what’s being described.
This article is more of a Troubleshooting page and how to resolve for your specific configuration.
There is not an Ubuntu official support requirement for Proton.
With SteamOS being Arch based, and Valve being a significant Proton contributer, if there were a specific OS requirement, it’d be Arch or AUR capable distro. But that’s obviously not the case.
If you actually read that page, you’d realize that “Requirements” is a misnomer, or at least misleading, page title for what’s being described.
This article is more of a Troubleshooting page and how to resolve for your specific configuration.
There is not an Ubuntu official support requirement for Proton.
With SteamOS being Arch based, and Valve being a significant Proton contributer, if there were a specific OS requirement, it’d be Arch or AUR capable distro. But that’s obviously not the case.
Again, not arguing with me, you’re arguing with Valve.