It could be connected, yep, something like:
- empty folder: <empty>
- 1doc in folder: <date last modif> + (1)
- 2doc in folder: <date last modif> + (2)
...
In folders it'd be useful to show that there are "3 docs" inside. This is especially useful in tools such as Tasks, where we have predefined folders (e.g. "Long-term tasks") that might be empty. Locating which folders are empty save clicks.