The rift between Mark Zuckerberg and Tim Cook started after Tim publicly criticized Facebook’s privacy policies, including responding to Facebook’s 2018 Cambridge Analytica scandal. He said that such a scandal would never happen to Apple because Apple does not treat its customers as products. The two have not always been on good terms and even tried to reconcile in 2017, but the meeting resulted in a “tense standoff.”

By Anthony Quintano from Honolulu, HI, United States - Mark Zuckerberg F8 2018 Keynote, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=72122390