Immutability Is a Guardrail. Snapshots Are the Net.

Immutable Linux distros get the headlines for being unbreakable. But the real stability secret isn't read-only bases or atomic updates. It's a recovery protocol that any system can run.

Snapshots are the undo button that exist on normal distros. No immutability needed. A Btrfs filesystem paired with automatic snapshots addresses the exact same failure scenario: a change breaks your system, and you need a way back. A snapshot is a near-instant, space-cheap record of your system at a point in time. Configure a tool like Snapper to take one before and after every package operation, and every update leaves behind a known-good state you can return to.

The recovery part mirrors immutable distros. With a bootloader like