Folders within folders for workflows would be extremely helpful. For example, there's no way to archive workflows, so being able to create an "Archive" folder within folders would help with organization. Of course we can create an Archive folder, but it would house everything, and not be organized by the types of campaigns etc.
I just want to add my voice to this requests. Not being able to have subfolders for workflows means that things get very cluttered and overwhelming very quickly: its difficult to keep track of things and easy to accidentally duplicate a workflow already in existence. Adding subfolders would make a huge difference when it comes to organization!
We haven't even scratched the surface when it comes to workflows and I can already see things getting out of hand without the ability to add subfolders, can't imagine scaling our automations without the ability to keep them organized.