i use folders in sharepoint libraries for the follwing reasons:
- when library has more than 2500 files
- when i want different permision for some files
- when i want to sync some files.
and i use a view without folders, which shows all the files organised with metadata.
if i want to upload a file with the same name that exist on a folder i want it to replace it...
the reason is i dont know where this file is (which folder)