[roblev]

Excel is an incredibly powerful environment to code. I learned it many years ago; I started thinking it was some arcane tool that accountants used and ended being able to deliver amazingly powerful tools to users orders of magnitude faster than systems developers. Yes they had bugs, but... so did the industrial systems!

Excel's real limitations came around scalability of developers (beyond one developer you are in a bad place) and performance that can drop of a cliff beyond a certain size. But it is an astonishingly powerful tool.