The news that Weil was leaving Twitter to become Instagram’s head of product broke during an executive off-site at the end of January, where Twitter was planning its goals for the year. Dorsey was blindsided and visibly upset. While he’d known Weil was leaving, he’d been under the impression it was to take a break, not go to a major competitor. Weil was escorted off the premises, and then Dorsey wrote an angry email to Twitter’s entire staff about his disloyalty.
