"A corporate developer gets almost no benefit from a VCS. Indeed the
reverse is usually true -
it just gets in the way. It means he has to take additional steps to copy
source around, it
means he has to add meaningful comments to his commits, and it means his
employer can track
what he is doing."
It is a huge benefit to be able to track what those idiot colleagues are
doing. Many are very poor at team-working and will lose your work, or
break things without communication. Good developers want managers to be
able to see the quality work they're doing (and pay/promote accordingly,
though promotion of the least technically gifted seems common).
SCCS was developed by corporate developer's for corporate developers, and
was the UNIX utility RCS improved on.