The point that it may be stagnant is well taken, which is why I said "reasonably successful" instead of "stomping everyone else into the ground". But irrelevant

The point that it may be stagnant is well taken, which is why I said "reasonably successful" instead of "stomping everyone else into the ground". But irrelevant it is not. Fair enough. But if you look at how quickly Windows Mobile went from being the de-facto Smartphone OS to completely irrelevant and take into account (as Nokia's CEO acknowledged) that they are being taken on and losing market-share at every point which they've usually excelled at, it's clear that while they may not be irrelevant now, the way there is not very long. The need to do something drastic was IMO very real. If going for Microsoft and Windows Phone 7 as opposed to other options like Android was the best choice can clearly be debated, but something had to be done. Staying with the "reasonable successful" platform they had would not have been a viable long term strategy.