Consider moving Flux and Redux explanations out of part 3 and into separate appendices?

[davidchang]

This may or may not be worth doing, but I find part 3 is a rather long piece that goes into a lot of detail into how Flux and Redux work (though a simple understanding of React is assumed in part 2). I wonder if it would suffice to just assume a simple understanding of Flux/Redux or to move these into a separate appendix?