At companies I worked it was used for political games within. Use it to blame bad code, use that blame later on performance review, deny bonuses and/or salary i

At companies I worked it was used for political games within. Use it to blame bad code, use that blame later on performance review, deny bonuses and/or salary increases. After transitioning to freelancer and being the sole user of it, it finally allows me to use it for its true purpose, namely refreshing my memory on some techniques. Sometime I copy/pasta code from older revisions on a different project because that's the code I need for current project (while the current code of that project changed due to client requirements changes). Also sometime it's used by clients to see how the status of the project evolved over time, so it also serves as a metric purpose.