We work on lots of asset rich projects - often the PSDs folder will span many (hundreds!) gigabytes for a small project, and we'll be working on multiple projects at once. The PSDs then often have source imagery and a whole load of clutter collected from clients. SVN is superb at dealing with this scenario, since as a coder I don't fill my machine with sources I don't need - but we need them archived and backed up none the less.
This is especially a problem if you're a developer with a fancy small SSD and the guy across the room has 6TB at his disposal for videos ;-)!