Essentially redux is programming the state part of your app outside your UI and having an immutable approach where given a state X with Y action, Z will always

Essentially redux is programming the state part of your app outside your UI and having an immutable approach where given a state X with Y action, Z will always result so its good for testing. This does allow you to reuse the redux parts in different frameworks quite easily but I have never done that myself. I personally find redux to be heavy for most apps as most apps are small but in teams redux shines.