"Existing users' access will be disabled at a later date."
Hmmm how? How can they decrypt your already end-to-end encrypted and uploaded data without you entering the passphrase to do so? I can understand them removing the data from iCloud completely, or asking you to send the keys to Apple, but I don't understand how they can disable the feature for already uploaded data.
What if the users don't agree to disable ADP? So if one pays for iCloud+, they'll be refunded? And what happens to their already uploaded data? Is it deleted?
I imagine if you choose to ignore the warning that iCloud syncing will cease to work unless you disable ADP, then at some point, the warning turns into an error and iCloud syncing will cease to work.
I can't imagine they'll cancel your iCloud+ subscription. ADP is not a feature of iCloud+ and iCloud+ has features beyond extra storage space. Nor can I imagine they'll delete your data preemptively as long as there's space to store it.
Hopefully they'll provide instructions on how to manually delete your iCloud data in case you don't want to use it any longer (I think you just turn off iCloud on all your devices).
I am going to say something a bit controversial around here, but all of this E2E and security stuff is just lip service for marketing to consumers.
These companies have to comply with so many laws and want cozy relationships with governments, so they play both sides. It likely does things differently, but if the keys are not secure, then its not secured
Hmmm how? How can they decrypt your already end-to-end encrypted and uploaded data without you entering the passphrase to do so? I can understand them removing the data from iCloud completely, or asking you to send the keys to Apple, but I don't understand how they can disable the feature for already uploaded data.