Creating a new project with Vercel now automatically assigns a default production domain, which can be customized or changed by clicking "Edit". This feature aims to reduce friction and increase the speed of deploying to production. Deploying to production is made easier by using the default branch or command-line interface, and the first deployment in every newly created project is automatically promoted to production. The change also makes it simpler to edit the default production domain or add a custom domain, with API adjustments to ensure compatibility with the latest version of the project endpoints.