SteamOS 3.8.10 has just been released for all users with the following changes:
These notes contain all changes since the previous SteamOS 3.7 stable release. See here for changes since the previous SteamOS 3.8.9 beta release.
General
Updated Arch system base
Initial support for upcoming Steam Machine hardware
Added support for waking from sleep via connected Steam Controller
Substantially improved speed of future OS updates on high-speed connections
Improved support for screen casting in...
Nobody should be using steamos on a non-steam-deck so I don’t really see it mattering much, I basically never use desktop mode.