Because environments were not automatically transferred, developers had to manually move their work:
Visual Studio Codespaces officially retired on , consolidating its features into GitHub Codespaces . Microsoft made this move to simplify the developer experience by providing a native, "one-click" workflow directly within the GitHub platform where most code already resides. Key Transition Timeline Visual Studio Codespaces is moving to GitHub
The service became read-only; users could no longer create new plans or codespaces. Because environments were not automatically transferred