Do you believe that the future of design tools is to eventually produce code, or work on the same code as the developers write? (Which seems to be the premise of React Studio)
I’m personally not sure this is possible, or even desirable, since the design process and development are very different. While designing I want to get things down quickly without thinking of edge cases or specifying all the behaviours, then refine later when I’ve validated the high-level design. But taking this approach to coding would probably result in an unmaintainable app without a solid structure.