* Microsoft still has plenty of cash, but is facing an existential crisis of losing platform relevance
* Their overall mobile marketshare is so low that they can probably throw that cash around with much antitrust attention
* They've had a hard time attracting hardware makers other than Nokia. If Nokia stumbles further, the whole phone platform could unravel.
* The traditional Blackberry market was enterprises, who probably would be a lot more receptive to the "windows everywhere" story than Nokia's customers ever were. Blackberry's original killer feature was arguably MS Exchange integration.