Excel is fantastic if you picture it as the World's Best Visual REPL. There's no doubt that it's overused, but it does occupy a very particular sweet spot. In

Excel is fantastic if you picture it as the World's Best Visual REPL. There's no doubt that it's overused, but it does occupy a very particular sweet spot. In fact, I think one of the best use cases for something like Light Table is to act as a spreadsheet killer.