I’m not surprised by spreadsheets at all. They’re extremely powerful, and I know they’re used heavily. But this was clearly a document just basically made up by the CEO on the spot.

Excel and Google Sheets can both be connected to data via APIs. Click a little refresh button and it'll pull in the latest data, run the formulas, and update all the sums and charts. This stuff goes back to the 1990s, and I've seen non-tech-literate secretaries set it up. It can be as simple as dumping CSV files to a file share and just loading that into a worksheet or two.

The fact that a company managing billions of dollars couldn't even do this much is very, very telling.