[donw]

It seems to work reasonably well for the two non-toy apps I've worked on that use a single state object. There are two key rules required to make this work, however:

1. For each domain, state can be modified in one place (in React, a store).

2. For each domain, state can be read in once place (a Presenter).

This preserves data-hiding for the most part, and keeps you from having to play hunt-the-wumpus when you need to change the data structure.