> Not embedded/linked by others Clean refactoring might need lots of works Tips for Existing Projects Apply Dummy Framework First Easier To Apply, Refactor Afterwards
> No need many scrolls and clicks > Preview with different language / device size Interactive Fast Access Preview Under Different Environment SwiftUI / Playground Live Preview > Preview in different view state
Test Driven Development in Playground To build faster at every iteration Write Failing Test Make It Pass Refactor Unit Tests / TDD are best to verify logic > Unit Test the framework in playground for interactive environment > Move to test target for CI after completion