Why is Redux needed?

Question

React

I don’t understand why you need an add-on in the form of Flux architecture, explain

Answer 1

Google "Event Sourcing". Here the same idea, only Event Sourcing is only state management (tobish model) and Flux is MVC + Event Sourcing. And Redux is Flux + single source of truth.
If you don’t have hundreds of states per screen, you don’t really need all this. But if you track the state of pain - then these things save.

Answer 2

I also don't understand why this is?
Do I understand correctly that my applications are apparently not yet large enough, and if I can get by with one state in the root parent, passing all the children in props, is it better to do without Redux or Flux?

Answer 3

https://echo.labstack.com/recipes/subdomains - very well explained here.