i don't think they would necessarily advertise a plan to attempt e2e this early. what if it proved to be infeasible? reversing course after an announcement like that would be a massive black eye.
have you ever seen a system like this that would be capable of flagging accounts for hosting bad material with a tiny false positive rate while being capable of e2e encrypting the material at rest like this one? i haven't, and it's an awful lot of engineering going to waste if that's not the goal.
they probably already do server side scanning, and probably regularly find stuff.
assuming that was true (which it very well could be) it would be insanely irresponsible to roll out e2e at scale without something like this...
there are probably hundreds of people or more at apple who can legitimately access the contents of a user account. e2e with inbound scanning would completely ameliorate that.
have you ever seen a system like this that would be capable of flagging accounts for hosting bad material with a tiny false positive rate while being capable of e2e encrypting the material at rest like this one? i haven't, and it's an awful lot of engineering going to waste if that's not the goal.