New update out for Preview users! SteamOS has been updated to 3.4.6. It has the following changes:

Since Mesa has been upgraded to 23.1, this should also handle Steam’s shader cache better, and less CPU overhead/VRAM use with Zink. If the former is true then hopefully we will no longer have to spend hours waiting for games to update.

See the patch notes on Steam. Note that you will need to be on the Preview branch in order to get this update. I’m also curious if any Deckers out there will notice less shader compilation time with this update; let me know if it’s been improved!