Very true, I've been in IT for over 20 years and have worked at sites ranging from 10 users to over 13000 users. I can attest to the flat filing system as the exception not the rule. At my current employer, looking at public folders on network shares the average folder depth is 5 deep. Many have a main repository and then secondary and Tertiary hierarchies using symbolic links to the same contents to help people find what they are looking for.