I'd argue the opposite; Microsoft should've been offering Office from day 0. That people have started using Numbers and pages on iPads has meant that they are a

I'd argue the opposite; Microsoft should've been offering Office from day 0. That people have started using Numbers and pages on iPads has meant that they are aware that alternatives exist and that they do open Offices document just fine. Surely making money from a competing platform as well as your own is better than making money just on your own platform.