Do we need the directories tag?
It seems very general and not all that applicable to the majority of 3D workflow questions.
Are there any pros to keeping this tag? Should we wait for a while and see if it gets used in a useful way?
I think it may eventualy be useful. Although most people use the default install location of blender, that has no white spaces, someone will eventualy come along that will install to "Program Files", which has a white space and run into problems with a python script.
I've already seen a post where the person who gave a good answer with some code had no need for enclosing a piece of python code that accessed a file because his file path had no whitespace, the person using his code ended up stating that it didn't work. He had blender in "Program Files" and that was why. It may have been just yesterday that I saw it.
This directory tag would fit well in a situation like that and alow anyone else with the same issue the ability to find it quickly in a search as long as a moderator/editor ensures it is tagged.