I never coded React Native, but I have a lot of experience with Flutter. You can definitely run into build issues, but it's almost exclusively when doing precarious things like upgrading third party packages, SDKs or Flutter versions. As soon as you've traversed the depths of dependency hell and it builds, it builds without a hitch repeatedly in my experience.
As the framework is maturing there have been some major transitions between APIs and project structure. My main app that was scaffolded two years ago has had no shortage of duct tape fixes and tweaks to especially Gradle/Cocoapods config to keep it building.
I guess it's a fair price for what has otherwise been a fantastic developer experience. All in all I'd strongly recommend it.
As someone with a lot of Flutter experience, I can second this. It usually works pretty reliably until someday you upgrade and cocoapods keeps complaining even when you clean everything and rebuild.
As the framework is maturing there have been some major transitions between APIs and project structure. My main app that was scaffolded two years ago has had no shortage of duct tape fixes and tweaks to especially Gradle/Cocoapods config to keep it building.
I guess it's a fair price for what has otherwise been a fantastic developer experience. All in all I'd strongly recommend it.