It also still remains to be seen whether Musk will lead to a meaningful surge in Twitter exits, or if his changes could attract more users.
Even before Musk announced planned changes to the platform, some people threatened to quit Twitter over his ownership.
"After some introspection, I've made the decision to focus my time and energy elsewhere and move on from Twitter," Nibel tweeted.
Producer Shonda Rhimes, who joined Twitter in 2008, tweeted on Saturday, two days after Musk's acquisition was final, "Not hanging around for whatever Elon has planned.
Critics have said they're worried, however, about a potential rise in misinformation on Twitter under Musk.