It's stateless the same way Chrome OS is: you put a systemd-timer on sudo apt-get update && sudo apt-get upgrade, and you only use the web browser and libreoffice.
ChromeOS also has a package manager and a full local filesystem, you just don't see it. Don't touch it on and XFCE debian derivative and it's the exact same.
ChromeOS also has a package manager and a full local filesystem, you just don't see it. Don't touch it on and XFCE debian derivative and it's the exact same.