There's a 'joke' that goes around occasionally that has some truth to it: "Excel is the world's most popular programming language." Occasionally it's 'Excel macros' or 'VBA' instead of just Excel.[1] The core truth of it is that a massive amount, possibly most , of the world's software is not a carefully hand-crafted application in that lives in Github written by expert software developers. It's a heap of Excel funct…
I cannot overstate just how much I love working on stuff in Excel and Google Sheets. It's the most popular programming language because it's incredibly intuitive to people at all levels of programming experience (especially the "none" level), it offers instant feedback, and in many cases, the results are trivially verifiable. It does have its flaws, that you've pointed out - there's no good way to write tests, I'm no…