Ember CLI Babel Transpilation

ember-cli-babel is the official Ember CLI addon responsible for integrating Babel into Ember applications and addons. It transpiles modern JavaScript (ESNext) down to a syntax supported by target browsers, leveraging `@babel/preset-env` and respecting the `config/targets.js` file. The current stable version is 8.3.1, with releases occurring as needed to align with Babel updates, Ember CLI changes, and bug fixes. Key differentiators include its deep integration with the Ember CLI build pipeline, automatic polyfill management (though `includePolyfill` was removed in v8), and support for advanced features like static class blocks and TypeScript transpilation. It provides a robust, zero-config-by-default setup while offering extensive customization options through the `ember-cli-build.js` file for both Babel presets/plugins and `ember-cli-babel`'s internal behavior, making it indispensable for modern Ember development.