Comment by CWuestefeld

Twenty-plus years ago I wrote a complete blackjack game in a spreadsheet, all using 1-2-3 "slash" macro commands (not VBA or anything like that). It even did insurance and doubling-down. I was part of the team testing the product, and each of us on the test team built a different casino game -- one guy did craps, and found a bug in the random number generator.

Once you get your brain around the paradigm, it can be a powerful tool.