Here's a more concrete thing - I work on a product that took years and a spectacular sum of money to get going on the data space (all it does is land CSVs into S3 and then load them into a database every day, < 10GB per day). The original designers decided that the entire thing should be powered by spreadsheets, so we now have about 10 full-time staff editing spreadsheets that trigger build pipelines, one of which I believe has 400 separate worksheets in it.
However, you are right that, broadly speaking, I have no idea what I'm talking about. I have made peace with this.