wtf is babel-preset-react-native-stage-0?

This is a preset (a configuration package) that lets you use cutting-edge JavaScript features in React Native projects without running into conflicts or errors. When you're building a React Native app, you typically need to tell Babel, a tool that translates modern JavaScript into code your phone can understand, what features you want to support. React Native has its own recommended setup, but if you tried to add "stage-0" (which unlocks experimental JavaScript features) on top of that, things would break. This preset combines them the right way, so you can use those newer features without the weird errors. To use it, you install the package and drop a configuration file into your project that tells Babel to use this preset instead of juggling multiple conflicting ones. If you want legacy decorator support (a specific advanced syntax some teams prefer), there's an alternate version you can use instead. The preset handles all the behind-the-scenes compatibility work so you don't have to manually figure out which Babel plugins conflict with each other or need to be ordered in a specific way. The main audience is React Native developers who want to write code using the latest JavaScript syntax without fighting Babel configuration headaches. For example, if you want to use async/await, optional chaining, or other stage-0 features in your mobile app, this makes it straightforward. The README acknowledges the confusion is real, it even includes a troubleshooting section for when people try to layer the regular stage-0 preset on top anyway and things explode.