I used rcs on a PDP/11 around 1984, and got my other employer to purchase the MKS toolkit for MS-DOS around the same time. I ported RCS to VAX/VMS myself, so that was covered too.
When I switched jobs in 1991, my boss did not blink when I requested source code control and coverage analysis software for the new project. The dollar cost of not doing source code control and testing were obvious for anyone to see. All my friends worked at places where source code control was standard, but that may say more about my selection of friends than about the industry :-)
I did not manage to kill FORTRAN and MACRO though, even after I showed the hidden costs (and fixed a couple of nasty issues in the old code in the process).
-- Bert