I can see the need for a VCS that doesn't grab the whole directory but is file based.

But this "SRC is built on top of RCS" doesn't sound like the best idea. RCS has been historically more errorprone than SCCS, probably because it doesn't use a checksum in its history file. So you never know if there has been a corruption or not.

Even though he mentioned SCCS "SCCS died off due to its proprietary nature", he doesn't seem to be aware that the Solaris version of SCCS got open sourced: http://sccs.sourceforge.net/