You really are helpful and you try to fix this so I really want to say yes but I am currently grinding for my own startup so I know that a lot of time will pass before I actually do it so I don't promise anything.

A good way to test it would be to make a simple websocket server that simulate n users each sending n' fake xyz position and rotation data per second. This data updates a Redux store in a React app made with Aframe (HTML wrapper around ThreeJS). You make n cubes move and rotate along the data in the store. Compare the fps you get against the fps you get with a vanilla solution. Also check what happens on the performance tab of chrome

I am able to recognize that my use case is very specific. I used React/Redux/Reselect and Aframe/ThreeJS with sockets a year ago. Now I kept React but the rest of the stack have changed for nearly a year