It would be cool to set a numerical property type for elements within components.
List based components (i.e. tabs, table of contents, etc.) are the primary use case I can think of, but there are probably others. Having the ability to increase/decrease the number of items within a component instance (using a number counter type input or something), would be a great alternative to building the components with random/maximum number of nested elements, and then hiding layers—or nesting a series of numerical variants, or some other alternative.