Comment by DanielHB

As someone who works with React Native this is definitely true. Imagine a venn diagram:

Full Navive: 2 very big bubbles

React Native: 2 small bubbles and one big bubble

It doesn't happen very often but it can be quite annoying to implement features that need native controls on both platforms. In my case I only know native android (no ios) so when implementing native things I need to bring in an ios native dev and agree on the communication API and any platform-specific edge case before implementing stuff.

It is a lot easier when I can do it all by myself and it is even harder for team members who have no native experience at all.