Comment by happosai

ChromeOS is much more close to regular Linux systems than Android. The vendors had support Linux properly to get into ChromeOS. This allowed google go support ChromeOS laptops for very long period. Also, a a side-effect Chrome OS contractors got to contribute a lot into mainline Linux.

Android Otoh let's vendors get away with shipping binaries that work once on one Android version, making upgrades pain. And thus Android devices are generally stuck with the build they released with.

The Google decision to drop ChromeOS in favour of Android is going is going to be a huge disaster for Linux ecosystem.