[luuurker]

No, although it used (not sure if it still does) to encourage people to enable backups. On Android I believe the default was Google Drive, so you'd have people send their chats to Google in plain text.

iMessages is another example of a secure service that lets users "break" encryption. As soon we enable cloud features for it to work across devices, the key is uploaded to iCloud, essentially making chats plain text to Apple.