Why is the architectural style MVC not considered a fully clean architectural pattern?

The architectural style MVC (Model-View-Controller) is often not considered a fully clean architectural pattern because:

• In classic MVC, View and Controller are closely linked and may contain logic, which violates the principle of separation of concerns.
• The Model may depend on the View or Controller, leading to tight coupling of components.
• MVC does not always clearly define the boundaries between layers, making scaling and testing more difficult.

Unlike pure architectural patterns (e.g., Clean Architecture), where dependencies are directed inward and layers are strictly separated, MVC allows mutual dependencies and mixing of presentation and control logic.

Thus, MVC is more focused on organizing the UI and user interaction than on strict architectural isolation of components.