Are what point do they stop pretending and just make it a pure linux platform with a different packaging format for any linux app to run in? They are doing it with CROS (or whatever the new Chrome on Linux OS is being called) and maybe it's time to do it with Android. Running a VM just seems quite wasteful.
But Google would much rather keep all of the data for themselves. If you could actually control what’s happening in your phone, it could interfere with Google’s main business model.