The referenced comment rehashes the evils of Ballmer's Microsoft which Nadella has mostly corrected. Satya Nadella has embraced (but not extended!) Open Source. Their Azure strategy puts all platforms on a level playing field - yet has also made Azure an incredible place to make Windows/Microsoft technologies shine. It's a great place for all apps.

Yes, they control Office and are the defacto office document standard. What they do with Office now is affordable and ubiquitous. No other office document suite can do this. They are a for-profit company, and Office serves their customers very well. Yes, in Ballmer's days this wan't the case, but today you can run Office (365/Cloud) on a Chromebook and on Android and iPhone as supported apps.