Facebook-owned WhatsApp is also facing opposition from the German government who is attempting to block the implementation of the new policy. If the result is that they decide that WhatsApp is illegally implementing this, there will probably be a three-month block on this. Facebook is already considering an appeal but they may also have to think of their next steps in Germany and maybe eventually other countries as well.
WhatsApp says that “the majority of users who have received the new terms of service have accepted them” but they will of course not release numbers on how many that majority is. We don’t know when they will start limiting user accounts that have not accepted yet but they have warned us enough times that they eventually will.