I tried to get our org on to something for a while, but got massive push back until 5 or 6 years ago when they setup corporate wide paid githup repo.

Before that, I found a small group of developers around 2005 that used CVS and they allowed me to leverage that for my group. But of course I was the only one who used it.

Back then I guess people loved loosing source code, which happened a lot until git.

But on the minis (non-DEC) I worked on back then, there was nothing. We kept a specific drive that had source current source, but once in production you just copied the change version to that drive, replacing what was already there. As you can guess, changes disappeared often :) And there was no change history, but we would tag each line changed with our 3 character ID.

Whereas today, we have a stack of virtual backup tapes plus a DAG on the labels.

(OK, only 30 years ago we were using SCCS or maybe already RCS.)

And whenever a code file was locked on the server, the Devs went into the server room (aka the break room with a computer) and rebooted the server. The production server that was used by 30+ employees.