Of all the Microsoft products, Excel is going to be the hardest to replace. Firstly, it's critical in many organisations. We all know you shouldn't run your bus

Of all the Microsoft products, Excel is going to be the hardest to replace. Firstly, it's critical in many organisations. We all know you shouldn't run your business on a spreadsheet, but everyone does. Just a tiny difference in how data is handled, an unsupported macro, a missing formula...the whole deck of cards collapses. Secondly, while people only use 20% of its features, everyone uses a different 20%.