Why is excel the best tool to make accounting and financial reports? What are the features that makes it so flexible and user friendly?

Microsoft Excel is a spreadsheet program which allows one to enter numerical values or data into the rows or columns of a spreadsheet, and to use these numerical entries for such things as calculations, graphs, and statistical analysis.
Excel helps us to make our calculations faster and we can draw conclusions faster by making graphs, pie charts.The layout of Rows and Columns makes it very useful for Accounting calculations and bookkeeping.
The columns can be summed for a total or added to other columns.
The data can be sorted easily.

It has all the ingredients that a report should have.
It can accommodate data, images, charts, formulas and many other calculation functions, import export features at a time.

Pivotable function Alt+N+v