My company works with over 5000 people worldwide.
7 years ago, Windows and Office. We thought we would always be a Microsoft company, until a new young IT manager persuaded us to consider switching to Apple with an initial test group of workers.
6 years ago, OS X and Office, with a possible transition to iWork and Scrivener.
3 years ago, OS X, iWork and Scrivener.
Today, we don't accept or use any Office files. If someone applies for a job citing Office skills, we think 'amateur and out of date' and reject them.
Business is up. Profits are up because of efficiency, and people using smart software to do smart things. Dumping Microsoft was the best business move we ever made.
Companies that stick with Microsoft do so out of ignorance, complacency and mediocrity. They think they need Microsoft. They are wrong. Who wants to work for or trade with such incompetent companies?
People say that they can't do X without Office. They are right. They can't. Other people can, and those are the modern open-minded people we want to employ.
Our only regret? That we didn't make the switch earlier.