This. Most finance people who live by Excel have ninja level skills with Excel. I have had to unpack logic from some excel sheets into webapps and they had so m

This. Most finance people who live by Excel have ninja level skills with Excel. I have had to unpack logic from some excel sheets into webapps and they had so much sophisticated programming embedded into it. And it is so much easier intuitive to use Solver for linear equations in Excel than any web application. Regarding the graphing ability , R may have more power but plotting the graphs in Excel is so much more WYSIWYG.