I agree in fact. There was one guy at my office (some kind of open source zealot) who insisted on using Open Office (and it's native file format) for everything, all he did was piss everyone off. Big companies need one standardised office suite, and since they typically already use Windows (and therefore have a relationship with Microsoft) it's just easier to use Office. And it's not that bad either. But for home users or small rebellious startups it's a different story.