You'll get a more informative answer from them. I couldn't speak to their motivations. But I certainly wouldn't advise doing it. ChromeOS has better security and performance than Ubuntu, and it automatically updates things like peripheral firmware that Ubuntu isn't even aware of.
It feels like the wrong tool for the job in both directions. If you wanted a host platform for Ubuntu you'd choose something else, and if you wanted platform software for a Chromebook ChromeOS is the right choice.
It feels like the wrong tool for the job in both directions. If you wanted a host platform for Ubuntu you'd choose something else, and if you wanted platform software for a Chromebook ChromeOS is the right choice.