It's a trade off — I'd disagree that a niche player can lose their position any faster than the incumbent. The incumbent, as you allude to, tends to only see ch

It's a trade off — I'd disagree that a niche player can lose their position any faster than the incumbent. The incumbent, as you allude to, tends to only see change as having the potential for loss and hence tries to avoid it; often to their detriment. Also, given Apple Computer Inc are now Apple Inc, a major OS X release has been stunted by a phone and an update of their laptops has been pushed aside for the release of a tablet, I wouldn't characterise the iPhone/iPad strategy as a defensive one.