Comment by chipsa

Counter counter argument:

New Folder New Folder(2) New Folder(3) New Folder(4) New Folder(5) New Folder(6) New Folder(7)

Muscle memory can be important as well. If I'm going through the Finder/Explorer, being able to pick the 4th item down and having it be the one I'm concerned about is helpful.

Johnny Decimal also helps with avoiding having too wide of a hierarchy, as well as having too deep of a hierarchy. Can't be more than 10 folders wide at the area or category levels, and can't be more than 4 levels deep.