Facebook is constantly updating and making changes to its platform, so there may be new versions or updates available periodically. However, there is not a single "new version" of Facebook that everyone is required to switch to. Instead, updates and changes are typically rolled out gradually and may not be available to all users at the same time.
Facebook also offers different versions of its platform for different devices and operating systems, such as the desktop version, mobile app version, and Lite version for low-end Android devices. These versions may have different features and user interfaces, but they are all designed to provide access to the same basic Facebook services.
If you are using Facebook and notice any changes or updates to the platform, it's always a good idea to check the official Facebook website or social media channels to learn more about the changes and how they may affect your user experience.