Not only does it assume a GUI for user input/output, on an API level there's the assumption of an HWND (window) and its message loop. Some Windows APIs aren't e

Not only does it assume a GUI for user input/output, on an API level there's the assumption of an HWND (window) and its message loop. Some Windows APIs aren't even available if you don't have that. Console-only applications are considered second-class citizens on Windows.