Big breaches like this are gonna be wild with advanced GenAI. Combing through the shit for the diamonds provided some degree of limitation on the impact of big breaches in the past but all those calls are going to be accurately transcribed and mined by AI and the attackers are going to have a buffet of products and targets laid at their feet.
Metadata can be identifying enough. For example, given someone has this data and some local LLaMa variant on their machine, they could theoretically run a query like: "Give me all of the people that $NAME have called to, sorted by the number of times they called each other"