Beyond Hype: The Evolving Android Architecture from Fat View Model to MVI

A practical walkthrough of Android architecture evolution from basic MVVM to domain-layer UseCases to MVI (Model-View-Intent). Using Kotlin and Jetpack Compose code examples, it shows how Fat ViewModels emerge in standard MVVM, how UseCases clean up business logic, and how MVI's unidirectional data flow and sealed intent classes make UI state predictable and easier to debug. The author advocates for MVI in complex screens while cautioning against over-engineering simple apps.