But the new era at Twitter could also be an opportunity for the company to redefine its brand for the better. But it remains unclear what Twitter under Mr. Musk will actually be, Mr. Calkins said. Twitter before Mr. Musk weathered a number of controversies that rattled some advertisers and users. But this is a potential inflection point for Twitter, Mr. Miller said. “I think the brand is irrevocably damaged, actually, unless and until Musk finds somebody else to run Twitter,” Mr. Kwittken said.

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