David Smith notes that Excel is getting a bit of an upgrade:
This week at the BUILD conference, Microsoft announced that Power BI custom visuals will soon be available as charts with Excel. You’ll be able to choose a range of data within an Excel workbook, and pass those data to one of the built-in Power BI custom visuals, or one you’ve created yourself using the API.
David’s point is that you can bring in R charts, but it extends to more than that.