Right, the problem with React is it has no global answer for application state, instead it provides a toolbox with which it is possible to set up your own state handling but frequently you face structural instability where a small change in your app’s functionality require large architectural changes.
> or some mechanism to exchange that small piece of state for a more complete piece of state
using links to refer to information is, like, not a totally foreign concept to the web (and certainly granted: in some cases this issue of signaling via url can get quite ugly; but often it's not).