In 1983, when I started using Unix, I went through the manuals for Unix System 7 trying to learn about every program that came with the system. So I tried SCCS, but at that time I wasn't developing software as part of a larger team so I decided it wasn't useful to me.
Many years later I bought the book "Applying RCS and SCCS: From Source Control to Project Control", half-read it and decided I still didn't feel it was something useful to me. It wasn't until 1998 or 1999 that I started using CVS, then a few years later switched to SVN, an finally to Git (between SVN and Git I spent a few years using Unity's Asset Server).
Many years later I bought the book "Applying RCS and SCCS: From Source Control to Project Control", half-read it and decided I still didn't feel it was something useful to me. It wasn't until 1998 or 1999 that I started using CVS, then a few years later switched to SVN, an finally to Git (between SVN and Git I spent a few years using Unity's Asset Server).