I have get involved into a large project which using React Native, we encountered many problems that spend not much time(but boring) to resolve as we have two group of developer which one is focus on iOS and another is focus on android, both have many years experience. And then I am in another project using Expo. Wow, it really save my time! These problem may happen in RN have been handled by expo, I could think there are lots of experienced ios/android developer behind expo helping us handle the caveat in the backend. I like expo!