So that you can exchange documents with people who are using MS Office without having to pay a fee to Microsoft and without being tied to Windows. I primarily

So that you can exchange documents with people who are using MS Office without having to pay a fee to Microsoft and without being tied to Windows. I primarily use a Linux machine to develop, so not having to dual boot or use a VM/Second computer every time someone sends me a .xls is very useful. The interface mimics (older versions) of office precisely to make the learning curve for previous office users as shallow as possible.