An option to collect open files in the top header bar and group them temporarily into a folder or work group in the header bar to help separate current workflows from each other. As opposed to the current state where if I need to switch between 2-3 jobs in a day and I need 3-5 files open for each to do my work, the open files header becomes a mess.
Folders could be made to look different to an open single file by some means and entering into a folder would act similar to windows explorer for example where you completely enter the space and you do not see anything in the previous directory branch.