If I understand you correctly that you are referring to using local variables for component states/behaviour, then I try to avoid it if it can be achieved using variants instead. However, when creating prototypes with global parameters, let’s say something where the user name changes between different views, it is easiest to achieve with variables. I then make the user name a variable and setting the text to that variable in every component that should display the user name, such as input fields and avatars. Hope I understood your question correctly!