>Yes, backing up is the most obvious reason to have it live on a server from the user POV. And of course the app vendor will want more lockin and be able to kee

>Yes, backing up is the most obvious reason to have it live on a server from the user POV. And of course the app vendor will want more lockin and be able to keep the data hostage. Android comes with auto backup, https://developer.android.com/identity/data/autobackup https://developer.android.com/identity/data/autobackup App developers choose to collect more data than they need.