The release candidate of Ionic 4.0, codenamed "Neutronium," has been launched, offering substantial performance improvements and bug fixes while stabilizing the API in preparation for the final release expected in early 2019. This major update introduces enhancements like smaller file sizes and faster startup times, aiming to optimize app performance across platforms such as iOS, Android, Electron, and PWAs. A significant shift in this version is the decoupling of Ionic from any specific framework, allowing it to integrate seamlessly with Angular, React, and Vue by utilizing standard Web APIs like Custom Elements. This approach also addresses previous challenges of version dependencies with Angular, enabling independent iterations and improvements. Ionic 4 supports official Angular tooling, making it easier to integrate with Angular apps, and plans to extend similar support for React and Vue. The Ionic team encourages community feedback on the release candidate to ensure a stable final release while committing to ongoing improvements and predictable updates post-launch.