Being an independent project is presumably going to have less dev resources than Facebook, as a non-official IDE they're also going to have a smaller ecosystem

Being an independent project is presumably going to have less dev resources than Facebook, as a non-official IDE they're also going to have a smaller ecosystem and not having direct access or influence with the core React Native development team is a disadvantage for Facebook tooling developers who would. Whilst it's not impossible to compete with official tooling, they'll always be faced with a distinct disadvantage where they'd need to deliver a lot of added value in order to attract relevant mindshare.