Microsoft has a history of abandoning technologies when they don’t catch on. And, regardless of whether they support it, they won’t be successful unless 3rd-party developers do so as well.
That is true, which lends to my apprehension about the technology.
What is equally true is that if Microsoft fails at this phone, they very much risk going from a corporate behometh to becoming a non-player like Corel or Nortel.
And they know this.