Originally /usr was the user data. Then the disks got full and someone stuck binaries into it. Then people moved to /u, /usr2, /home, or whatever your ix vari

Originally /usr was the user data. Then the disks got full and someone stuck binaries into it. Then people moved to /u, /usr2, /home, or whatever your ix variant (or site) wanted for user data. The ix file system standards are the retcons of a bunch of hacks made by sysadmins trying to stave off users with pitchforks. Philosophy my arse.