If you work in financial sector, you will know how wide spread excel is. Sure enough we could stop using excel as a company, but it means we couldn't effectively exchange files with our clients, regulators, partners, etc . Well, we could but no one is going to hire a few dudes taking support call when our clients, regulators, partners complain about the spreadsheets we send them.
If you don't rely on excel to do what it's supposed to do -- math or data analysis, you might as well write your data on a piece of paper or better yet, write it in word processor :-)