(Another post about React Native)

Facebook engineers keep telling everyone that React Native is not used in the main Facebook app. I always wondered what is stopping them from start using it. Perhaps app size is a massive concern? Maybe all this tooling around their app is not really compatible with React Native?

Its interesting that they have a ton of legacy Obj-c code (considering that companies started to build apps not very long time ago, and they already re-wrote their app several times) I wonder if any other company is a situation like this well other than Apple.