You have to ask yourself why this isn't possible anymore. Similar to how recording calls used to be possible but no longer. I don't know why it is but it is awfully strange that they keep tightening the belt on what we can do with our own devices.
You can do it on iOS officially. Android never had an official backup process, it was always through root apps. Backups could just be a casualty of killing rooted Android.
Why would recording calls not be possible anymore? On a rooted phone you can do it, some amixer and arecords might be needed, but it stores the audio of both sides.