I've been searching for something along the lines of React which does what we were doing with Flash a decade ago.
Namely: Timelines and Layers.
Timelines with "keyframes" in which actions would be triggered "onEnterFrame" were so dead simple and obvious to use. The visual editor - while buggy - did at least provide a visual way to group "symbols" (i.e. "React Components") and instances on the stage.
Each keyframe provided a new stage.
I think that some of us at the time had accidentally discovered a Redux-ish way of managing the overall "state" of the application, and had also found that one-way data-flow solved many problems.
So, HackerNewsies - have we already got a project started "out there" that provides for something like this?