Can anyone with a Chromebook expand on this? Do they actually update to the latest stable releases (v4.4, v4.5, etc), or does it mean they always keep up with the "fix" releases (v4.4.10, v4.5.4, etc)?
This may answer your question. https://www.chromium.org/chromium-os/chromiumos-design-docs/chromium-os-kernel