This is an excellent answer. Let me add another data point for item 2. I know of several companies which have passed their ISO certifications or audits in no small part because of certain formulas in certain Excel workbooks.
If you are not familiar with ISO Certifications, this is a Big Deal. If you are familiar with Excel, this is mind-blowing.
If you are not familiar with ISO Certifications, this is a Big Deal. If you are familiar with Excel, this is mind-blowing.