@TheSwiftDojo I’m interested in this as someone who has heavily invested in MVVM and SwiftUI. While I appreciate the Action, State, View loop you mention, this is still the same loop when using MVVM, action, updates model (state), view updated. That said I do find that using MVVM feels like it’s fighting the default architecture patterns. Just wish Apple had codified the Swift UI architecture pattern to avoid this mess. We use MVVM to encapsulate business logic and view logic, also aid testing.

@TheSwiftDojo Can you explain what you mean by Preview as a test? I agree manual testing is just as powerful as TDD but for me the real value of tests is protecting against regressions and giving confidence to enable future refactoring.