My enjoyment of React grew exponentially once I moved from Redux to MobX.

I second this. In my last largish application, state was getting really messy and I needed a place to keep it all organized. I really tried hard to get Redux to work as at the time it was the tool that everyone was talking about. I struggled and couldn't make sense of it. Eventually I stumbled upon MobX and it just clicked. So easy to work with and checks all of my boxes. Productivity and happiness soared :)