A number of people in the community seem to have latched on to this "you MUST put EVERYTHING into Redux" idea, but it's definitely _not_ anything that's pushed by the Redux team. trex654 is correct here - it's entirely up to you to decide what state should live where.
The Redux FAQ addresses this at http://redux.js.org/docs/faq/OrganizingState.html#organizing... . Note that a number of the linked comments regarding whether or not to use Redux come straight from Dan Abramov himself.
Also, I have a number of articles on React state management practices as part of my React/Redux links list, at https://github.com/markerikson/react-redux-links/blob/master... , which may help clarify some of the ideas as well.
