However, as an 'HCI' for programmers, the PARTS Workbench has many features that are not in modern Smalltalks. It has an immediacy that makes it very good for introductory teaching and for rapidly implementing programs with visual interfaces.
The PARTS Workbench functions as a distinctive HCI tool for programmers due to its unique characteristics, which differentiate it from contemporary Smalltalks. This uniqueness makes it well-suited for educational purposes and rapid program development with visual interfaces.