Unless BOTH ends of a conversation are using it, it's pointless.
This means that turning it on does nothing in terms of privacy, in practice, today. All of the iMessages you send and receive will be readable using the escrowed keys from
the other users you are messaging with.
Perhaps at some point Apple will prompt or nudge people to migrate, but that's unlikely given the risks to data loss for people who forget their credentials (and have "nothing to hide").
Unless BOTH ends of a conversation are using it, it's pointless.
This means that turning it on does nothing in terms of privacy, in practice, today. All of the iMessages you send and receive will be readable using the escrowed keys from the other users you are messaging with.
Perhaps at some point Apple will prompt or nudge people to migrate, but that's unlikely given the risks to data loss for people who forget their credentials (and have "nothing to hide").