• Cyborganism
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    9 hours ago

    (correct me if I’m wrong, I’m also new at this)

    There are two partitions. One with the current system, one with the previous system. Updates are applied in a whole batch at once, once in a while.

    Current system is cloned into the old one and an update is applied to the clone.

    Once the update is complete, system reboots in the clone, and what was the current system becomes the previous one.

    If something goes bad, you can reboot into the previous system and fix the clone.