content: Except, unfortunately, LibreOffice calc will never beat excel. Nor will whatever amazon makes. Excel, and to a lesser extent outlook, will keep microsoft office relevant for a long time. I'm not saying that Calc can't do everything excel can; calc can do it (though i've seen some issues on large files that aren't there in excel), but its a matter of excel is what the accountants of the world know how to use, and what they are trained to use. Excel will remain king for the same reason TI dominates the high school graphing calculator market, sure, casio makes devices at 20% the cost that are more powerful and just  as easy to use, but they are different, and not what people want to learn how to use. Talk  to anyone who's job is crunching numbers in a spreadsheet program. Put libreoffice calc in front of them. in 20 minutes, they will be begging for excel Amazon might have a chance, more so than the Libre suite, because what offices desire is stability- if you are a major customer, and run into a serious issue using excel, you can call MS up, and within the week, its been patched. You find a serious bug in Calc, and you either need to get a developer that you likely don't have on staff write a patch, or beg that someone from the community patches it. Sure, it works for the guy who needs to make a table to organize their life once in a while, but excel just can't be beat for actual number crunching.