I am learning MobX State tree, and using the references to objects in a tree, with normalisation (ensuring you don't have duplicates in the tree, etc). It's impossible not to think that state management is getting closer and closer to client databases for more complex apps.

I'm really hoping WebAssembly will finally bridge the backend and the frontend data structures seamlessly, because right now we are getting to the point of keeping 2 separate data schemas, which is a huge waste of effort.