From a Washington Post story by Naomi Nix and Will Oremus headlined “Move faqst and beat Musk: The Inside story of how Meta built Threads”:

Adam Mosseri was on a family vacation in Italy last November when he learned he’d have to go toe-to-toe with Elon Musk. The mercurial Musk had just taken over Twitter. Amid the ensuing chaos, Mosseri’s boss at rival Meta smelled opportunity.

CEO Mark Zuckerberg and other Meta executives wanted to woo creators from Twitter to their social networks. Mosseri, who runs Instagram, paused his holiday to take Zuckerberg’s call.