MobX
frontendDropped
Vue didn't take root, and the MobX experiments got wound down along with it: we didn't adopt it, and global state in our React projects stays with Redux.
Assessing
MobX is a lightweight, concise library for state management in JS applications. It's built on reactive programming principles: it automatically tracks dependencies and updates only the parts of the UI that depend on the state that changed.
A more convenient library than Redux, because it requires less boilerplate.
Took a closer look and gave it a spin while I was testing Vue JS — I'm considering it as a possible Redux alternative in our React projects.