You can do a lot without it.
Who needs a combined Android and Chrome OS when Chrome OS can pretty much run it all. There's native Chrome OS, of course, and official Android support via Google Play Store. There's even preliminary ...
Google is developing a Linux terminal app for Android. The Terminal app can be enabled via developer options and will install Debian in a virtual machine. This app is likely intended for Chromebooks ...
Chromebooks with the right stuff inside are now able to install and run a complete Linux experience with the KDE desktop without giving up the Chrome OS on the same device. It is not yet flawless, but ...