The code speaks for itself. Any Android implementation is now split in two halfs, one which is easily replaced and one which is not.
If vendors choose to not use this feature it is on them.
If vendors choose to not use this feature it is on them.
http://androidbackstage.blogspot.de/2017/08/episode-75-proje...
If they say "install it this way or no Play Store for you", every manufacturer will follow.