SteamOS 3.0 will have an immutable filesystem - a first for arch? — During the Steam Deck Development live steam, Valve finally gave us some good news and said that SteamOS 3.0 will be generally available for everyone to install on their computers. They also revealed that SteamOS 3.0 will have an immutable root file system to prevent unauthorized access and use PipeWire for audio.
Manpage for transactional-update — Transactional-update updates the system in a transactional way; this means updates are atomic, so either the patches are fully applied or nothing is changed. The update does not influence the running system and it can be rolled back. To activate the changes, the system needs to be rebooted. To achieve this transactional-update is using Btrfs' snapshot mechanism, combined with the default distribution tools