@Linux >Chrome OS is Linux also (Google's Linux but not a Free Desktop type)
You really can't help but to contradict yourself with doublespeak instead of accepting the reality that Linux is only a kernel can you?

As far as I can tell, version of Linux that chromeOS uses is just a custom config of the proprietary kernel from kernel.org - after all, chromeOS is just Gentoo GNU/Linux with the freedom removed.

Sure, by default it uses the Freon windowing system instead of a windowing system from free(proprietary)desktop.

A non-confusing and correct way to point out how chromeos differs from the typical config of systemd/Linux and GNU/Linux would be; "Chrome OS is GNU/Linux, but restricted and with the Freon windowing system".