Yeah, I also like to use redux with a clear separation between actions that change state and those that don't. (For example, reducers only take actions prefixed by DATA_ or UI_, all other actions...the bulk of them really...don't have anything to do with changing state and are handled by other processes. But because of this I don't bother with action creators, so what do I know!)

A conceptual appeal of mobx to me is that this distinction seems baked in. The original mobx didn't click with me like redux did ¯\_(ツ)_/¯, but if MST gives transactional updates and support for redux dev tools (right?) could be worth trying.