As an iOS developer, I found out by personal experience that it was much easier to learn native Android development than React Native. I think RN is a great choice for seasoned web developers who want to jump to native mobile development. Regardless, this kind of personal experience is usually irrelevant, from business point of view, we need to think about the impacts of adopting RN on engineering team’s tooling, testing, dev flow and instrumenting. The shocking news of Facebook’s shutting down Parse is still fresh and reminds us that any layer of extra dependency will be a hidden trap down the road. Technology wise, I am pretty impressed by the fast innovations of RN, and hope it will not be a replay of what HTML5 failed for hybrid apps.