ChromeOS uses ext4 for it's root filesystem; so it would still affect the Downloads directory (it needs the isolation of user permissions for its sandbox w.r.t.

ChromeOS uses ext4 for it's root filesystem; so it would still affect the Downloads directory (it needs the isolation of user permissions for its sandbox w.r.t. the root user). In other words they will still need to make a workaround. They might as well do the right thing and support it properly; and it can be supported and still be easy to use, it just requires more work on Google's part.