To be able to convert a Folder/List into a visual flowchart. For systems and processes, this (to me) is a more palatable visual when compared to a Gannt Chart.

Dependencies could be used within a specific chart but could also be used to connect Flowcharts from department to department. For example, there is a hand-off in the production line to the next department. A dependency could be that the next department in the process checks off (marks task complete) that previous department completed all the tasks in the chart before handing it off.