[robotbikes]

Well their long term goal is evidently moving to a microkernel based based OS rather than Linux. This seems like a lofty goal if they aren't for instance planning on switching to Fuschia (which may replace Android all together). Also its not like there are a lot of open mobile stacks that don't involve basically creating a ecosystem from scratch, aside from the Librem phone by Purism which is trying to integrate with the existing Debian/GNU Linux ecosystem.

[strcat]

Doing away with the Linux kernel is a much longer term aspiration. The intention is to use virtualization as a way of reinforcing the app sandbox and/or user profile isolation in the meantime. There has been successful experimentation with this already, but fully integrating it and maintaining it will need to wait until the project has gotten further underway and has more developers that are up to speed on it. It's one thing to simply integrate Xen or KVM for toy examples and quite another to more meaningfully integrate it in an invisible way that preserves the existing functionality rather than being useful only as a proof of concept for research or presentations.

[pjmlp]

That is how ChromeOS runs the new Linux sandbox, implemented in Rust.

Check the Google IO 2019 talk about Linux support on ChromeOS.