I take it no one posting so far is in the security business end of IT? Just think about how many xp machines are out there, still., Yes I know it's rediculous. Let's just abandon them with no critical patches and hand over that future "Botnet Farm" to the bad peoples in the webs.
Yes the companies/users are at fault for still using it. So what should M$ do. Patch them and let it's use die slowly over time, or witness another embarrassing headline for a WINDOWS XP Botnet type attack with their name attached to it right or wrong.
Down the road when they have full subscription O/S's they will be able to control it if that ever occurs. /skynet.
Think Google. At any moment if needed they can pull any Google App if they had to. Nimble vs the Lumbering giant model. meh back to the morning coffee