Crappy spreadsheet is just the codification of business processes. Those are inherently messy and there's lots of assumptions, lots of edge cases. That's why spreadsheets tend towards crappy on a long enough timeline. It's a fundamentally messy problem.

Spreadsheets are an abstraction over a messy reality, lossy. They were already generalizing reality.

Now we generalize the generalization. It is this lossy reality that people are worried about with AI in HN.