It's very tied to the react / facebook ecosystem. Nuclide for atom was the official release by facebook for supporting flow + react, and now you have Atom-IDE

It's very tied to the react / facebook ecosystem. Nuclide for atom was the official release by facebook for supporting flow + react, and now you have Atom-IDE which is optimized for react + immutable.js + flow. Plus the facebook guys are avoiding VScode like the plague and focusing entirely on Atom. Which now also comes with the BSD+ licence.