React+Redux. I can focus just on what the structure of the UI should be and not the nitty-gritty of actually updating it (React handles that). State management

React+Redux. I can focus just on what the structure of the UI should be and not the nitty-gritty of actually updating it (React handles that). State management through Redux so I can consolidate where application state is held, and testing it is straightforward and a feature of the library.