Not every work that uses computers is heavy on writing docs and sheets.Don't understand how people can work with linux. I have tried OpenOffice / LibreOffice and both are terrible! Also lots of programs only works on Windows
Nothing better than Microsoft Office. I have to say that other Open Source software sometimes is good, but in most cases I prefer paid software.
Also if you did research you will often prepare your papers and articles in LaTeX anyway.
If you do programming for big paid server/client applications it is really probable you will have to work with Linux.