The most popular Symfony component is the foundation for most PHP developer tools : from Composer to PHPunit, Doctrine migrations, Psalm and Flex ... and your CLI applications. For more that 10 years, it is the most reliable way to create commands with arguments and options in PHP. In every version, the package evolved to offers much more than that. In this talk, you will (re)discover some of the most prominent features and some niche one, that could make you a happier developer.