I think this reaction actually is the underlying flaw in your search for a great calendar app. Have you even tried the Outlook app that the Sunrise team is working on? Companies (and people) can and do change. The Microsoft of today is no longer the Microsoft of the late 1990's or early 2000’s. I’d love to hear what is driving this continued hatred.

Change is constant and can very well be painful, but it’s happening quicker than any of us can fully comprehend. I’ve very much learned the hard way over the years that opening my mind to other possibilities makes navigating change far easier.