A thread on the damages of excel:
1. Rogoff and Reinhart had found that high public debt hampers growth, a finding used to justify austerity cuts. They hadn't selected the entire row to average growth rates. In fact, growth is *higher* at 90% public debt
https://theconversation.com/the-reinhart-rogoff-error-or-how-not-to-excel-at-economics-13646

Because of a mistake in a spreadsheet, JP Morgan Chase wrongly reported 6 *billion* in losses in 2013, possibly leading to a 600 mio fine
https://www.google.com/amp/s/qz.com/119578/damn-you-excel-spreadsheets-jp-morgan-edition/amp/

MI5 bugged 134 telephone numbers that were irrelevant to any investigation because a spreadsheet wrongly formatted the last 3 numbers
https://www.theguardian.com/government-computing-network/2011/jul/01/mi5-data-collection-errors?CMP=Share_AndroidApp_Other

Human genes had to be renamed because they were systematically misformatted as dates in excel
https://www.google.com/amp/s/www.theverge.com/platform/amp/2020/8/6/21355674/human-genes-rename-microsoft-excel-misreading-dates

At the London Olympics, 10'000 nonexistent seats were sold for a swimming event due to a mistake in a spreadsheet
https://thatauditguy.com/excel-error-of-epic-olympic-magnitude/