I had a similar experience several years ago. It got worse when I began to consider dependencies in the supply chain itself. What version of our CI system are

I had a similar experience several years ago. It got worse when I began to consider dependencies in the supply chain itself. What version of our CI system are we using? What OS base image? What version are our worker VMs on? What packages are installed on them? And on and on and on. When I began writing these sources of upstream variability down I began to find dozens of them, for what was, in dependency terms, a fairly unremarkable application.