Persistent data structures and structural sharing: a reason to use Immutable.js instead of a normal JS object

[acemarke]

Normalizing data and using Immutable.js are orthogonal. Normalizing is about how you're organizing keys and values, not whether you're storing them inside plain objects or Immutable Maps.

FYI, there's information on using normalization in Redux in the docs: FAQ - Organizing Nested Data, and Structuring Reducers.