[rogerbinns]

Imagine it is 2003 and you are doing a startup. You aren't deploying anything yet. You need a source code control server, a bug tracker, build servers, testing systems (so many versions of Windows), developer workstations, a file server, and various other bits of infrastructure (plus backups). This easily results in multiple systems per developer. Internet connectivity was slow and expensive which is why this kind of stuff was in the office, not at a colo. So your office needed proportionally more space per person.