@olivermbs It's not completely necessary, but complies with Vue's stated best practices:

You have probably noticed that we have been exclusively using ref() instead of reactive() in composables. The recommended convention is for composables to always return a plain, non-reactive object containing multiple refs. This allows it to be destructured in components while retaining reactivity:

// x and y are refs
const { x, y } = useMouse()

Returning a reactive object from a composable will cause such destructures to lose the reactivity connection to the state inside the composable, while the refs will retain that connection.

From Mixins to Composables