None of the folder views provide us with a satisfactory overview of all our lists. We can't add custom fields (only at task level) and we can't filter or sort the lists easily in the overview, gantt view, list view or board view. It means we don't have an at-a-glance view of all the projects currently in play (at least not in any logical order or with the basic details we require). I would have thought would be a fundamental element of a project management tool.