While I think this is a great improvement for building better UIs, it still boggles my mind that React, V in the MVC, needs an entire build step with that many moving parts and complexity.
Hopefully this improves the DX, though. I dread touching anything written in React that is older than 6 months.
for 99% of teams out there, react is not the V in an MVC pattern. In most cases it's a stand alone project and basically is your framework - your model is an API call from react, and react is also the controller.