I have not worked on a project with 20 AI-assisted contributors. I have worked on a team with 4. While smaller, I can already see that the code churn, and conflict resolution is more a kin to a larger team. However, we also have been introspective about how we can interoperate with these new disruptive tools -- ritualizing the LLM's ability to create and maintain documentation and perform code reviews has been indispensable. Perhaps 20 on a project is unsustainable, and even unnecessary.