Both are usually unnecessary, just pass down functions that call setState as props. That method works for 95% of problems and has the added benefit of being idi

Both are usually unnecessary, just pass down functions that call setState as props. That method works for 95% of problems and has the added benefit of being idiomatic react, thus making it easier to read, maintain and reason about. There are some rare cases where something like redux makes sense, e.g. you're hooked into some kind of streaming wire protocol and your UI needs to make many updates in real time based on a variety of diverse messages streaming over the wire. Most of the time though, these opinionated state management solutions are overkill.