> Apple's SSO may not be eternal but it's also very unlikely to disappear overnight. If it is indeed going to be phased out you will have advance notice of this

> Apple's SSO may not be eternal but it's also very unlikely to disappear overnight. If it is indeed going to be phased out you will have advance notice of this and a transition period. They may well offer notice and time when they cancel the service in some future. They won't offer any of that if they happen to erase your account just because though, as has happened to many people.