At the moment, each extension of the plugin Meta Box is provided separately. They acts like a small module that provides only one functionality for one purpose. While this approach is good for continuous development, users might not want that. Some users who purchased the Developer Bundle have suggested a AIO package that includes all the extension in a plugin. This way, they only need to install 1 plugin instead of 15, keeping the Plugins page clean and still have all the functionality.
The Meta Box AIO will be updated when an extension is updated. You still have the benefit of the auto-update feature. Also note that you don’t need to install the Meta Box Updater extension anymore. This AIO extension already includes it inside.