I wouldn't say Redux is dead, but there are a number of alternatives. My team has switched from Redux to MobX for all new development, as the two libraries solve the same problems, and we find MobX a bit easier to work with for our specific use cases.

There's nothing wrong with Redux; we just found that Redux based code tended to have a fair bit of boilerplate, and it wasn't as easy to maintain code using Redux as we would have liked. Every dev team has to find the right place to draw the line on implicit versus explicit, magic versus verbose, convention versus configuration. No real right or wrong answers.

> I thought mobile was just starting to adopt the redux architecture

I don't think so, no. The Redux architecture (ie, reducers, actions, etc.) is fairly specific and not universally loved. I would say that people are starting to really grasp the importance of solving the problems that Redux solves, however.