SteamOS is Valve’s Linux-based operating system. It features a seamless user experience optimized for gaming, while retaining access to the power and flexibility of a PC, and plays tens of thousands of games on Steam. SteamOS officially ships on Steam Deck, and will soon ship with certain Legion Go S models. We’re currently working on adding support for more devices.
Just because it’s not officially supported does not mean it’s released.
And it was released in 2013. This post title doesn’t make much sense.
Steam OS 3 has basically no ties its processors which makes this release meaningful
Exactly. Steam OS 1-2 were Debian based. SteamOS 3 is Arch based. That’s a massive difference, and AFAIK there’s no upgrade path to SteamOS 3.