Sure, here is a very basic example:
This component called "duplicate-content" has two unnamed slots (=default slots) .
When using this component, the single provided content gets rendered twice.
As you said, with named slots this does not work. But with unnamed/default slots it does.
If this behaviour is intended it would allow some advanced mechanics, like conditionally applying a wrapper or conditionally placing content in different locations within a component.
A real world example in one of our projects: We have a sidebar, which is wrapped in a dialog on mobile screens, but part of the static flow content on desktop screens. Currently, we need to provide the same sidebar content twice, because we use two different slots and locations in our layout component. Not a big deal, but it could be improved with this feature.
We've also stumpled upon many more use cases for this, so I was wondering if this is safe to do?
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