Twitter’s “volatility” and “unpredictability” under Musk provided the opening to compete, said Adam Mosseri. But he also warns: “I think it’d be a mistake to underestimate both Twitter and Elon”

Meta’s new Twitter rival wants to suck Instagram users’ data, including health, location, search history and sensitive information, into the new Threads service. Under EU data privacy rules, it faces higher hurdles than in the US or UK, where it is launching on Thursday.