What happens when a project team gets a new member who never sleeps, never complains, and can draft a paragraph in seconds? Does generative AI make collaboration smoother—or quietly replace some of the collaboration itself? Who is really doing the thinking when AI produces the first draft? And what happens to learning when students no longer need to argue over every sentence? In their new study, Anna Korchak, Jamie Costley, and Mik Fanguy delve into this tapestry of questions by looking not at students working with AI alone, but at what happens when AI enters the messy, negotiated world of collaborative academic writing.