I am a daily user and I have the following issues:

• Steam Link does not work with Android devices (including Android TV) on Gamemode
• Sometimes desktop has color errors
  • This is always fixed after a reboot
  • This should be fixed with 3.5.1, but it still happens sometimes
• Big picture mode does not work on desktop mode
  • I think this is a bug in the newest Steam Beta Client and not Steam OS

Also, I heard that Steam OS does not boot with custom boot videos via Decky Loader. Custom boot videos via Steam work without any issues.