React team here. I think this is largely true. We’re already working on tackling a lot of these rough edges; see a recent post I made to learn more:
https://facebook.github.io/react-native/blog/2018/06/14/stat...
https://facebook.github.io/react-native/blog/2018/06/14/stat...
A perfect example is qr/barcode scanning - there are numerous commercially supported "enterprise" scanning engines which are substantially more performant than builtin solutions or existing open source solutions. If you can meet a few of these requirements with main library support it would become incredibly hard not to use react native in B2B solutions.