PLease no. If someone compromises one of the contacts in a large chat group's google password or whatnot, they now have the entire message and media history from me to the chat group? This is exactly why iMessage is so useless for security - one compromise on one person's apple ID and all their groups have all their messages compromised going forward.
That works the same for signal as well, if a person's phone is compromised they have all their chat. What are you talking about? Even signal folks repeatedly have iterated they don't protect messages when a device is compromised.
