Excel as Code

Not counting Excel users, there are only about 30 million programmers. The problem is that we are treating Excel like its a word processor, and not what it is: a programming language. None of this applies to Excel because Excel doesn't work well with revision control. The path to enlightement is a more sophisticated revision control systems - ones that can understand Excel. Now that we have a revision control system for Excel, we can start to think seriously about CI/CD and what it would mean to really treat Excel as code in a modern development environment. Unit testing excel might mean ensuring certain formulae meet a set of external assertions that ensure that they still "Do the right thing". Excel users want to keep using the power of their favourite language.