Three years on from Microsoft’s decision to acquire Nokia’s devices business, the fortunes of the two companies are hardly what then-CEO Steve Ballmer would have predicted. Ballmer’s successor, Satya Nadella, has made successive moves to limit the damage of the disastrous purchase, but has still succeeded in making investors worried about the lack of any apparent strategy for mobility. Meanwhile Nokia, free from a business which had become an albatross, has not only been free to buy Alcatel-Lucent and built up its networking activities, but has now re-entered the devices space via manufacturing and licensing deals. At Microsoft’s annual shareholders’ meeting last week, one investor asked: “I have heard that you are stepping away from mobile. Can you calm me…