That's a joke right?
VSS is by far the shittiest VCS I've had the displeasure to use, though I will confess I never had to suffer through RCS and CVS.
It's certainly the only one which managed to destroy data. 'twas a good thing I'd already used other source control systems before VSS, because that experience would definitely have made me flee from source control systems for a while (much as Java did static type systems).
We switched to CVS and it was immediately better, followed by SVN a few years later. I still use git like a fancy subversion, just with multiple repositories :-)
There's some good links there that describe the trouble VSS caused.
It haunts my nightmares.
When we were migrating to git, some of the more senior engineers came up with a workflow that was described as "the best implementation of ClearCase in git that I've ever seen". It was meant as a compliment.