[partiallypro]

"Our product is our stock" - quote from HBO's "Silicon Valley"

Basically, this. Start-ups and their investors are looking to cash out. Imagine if Apple or Microsoft had been bought out by IBM in their early years, instead of them both disrupting the space drastically.

For the record, from a Microsoft stand-point, I think this makes perfect sense. They were acquiring talent and a user base it's foolish to have two competing products in your portfolio. From a user standpoint, it probably sucks (I've never used Sunrise, and actually already use Outlook's calendar.)