SteamOS 3.9.0 Preview

What happened

Note: This update is for the Steam Deck Preview channel, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel. Note on Preview Releases This is an early Preview build of SteamOS 3.9, and may contain unexpected bugs or stability issues. If you encounter problems, please consider filing a bug on the SteamOS issue tracker. The following notes are an o…

Summary assembled by rule from the sources below

Sources