Actually, Nokia was slowly and steadily on a rebound in the markets where they were traditionally strong. E.g. market shares of Windows Phone in the five largest European economies has grown from 4.9% a year ago to 8.2% now [1]. That's almost half the marketshare of iOS (17.3%).
Most of those units were Nokia Lumias.
Sure, it's not where they were years ago percentage-wise, but the smartphone market has grown enormously since then, and WP is showing good growth (except in the US).
Source: http://www.nu.nl/tech/3565096/windows-phone-groeit-nieuwe-sm...
Btw, nu.nl is not a source, really not a source. Tweakers.net is also not a source, too biased (i know you didn't mention tweakers, just sayin').
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The report [1] speaks of sales and actually claims that 42% of the sales are actually coming from feature phone owners (who probably like the price point of the Lumia 520 and all). Retail channels are not feature phone owners ;).
Btw, nu.nl is not a source, really not a source.
Of course it's a source, but you can dispute its reliability. For a substantial part of the Dutch population it is reliable enough to read daily. And it's not as if they have an agenda here.
Tweakers.net is also not a source, too biased (i know you didn't mention tweakers, just sayin').
So, what's the point of dragging Tweakers.net into the discussion?
[1] http://www.kantarworldpanel.com/Global/News/Record-share-for...
As to the life span of tech companies I think it will only get shorter. One thing I find interesting is that it's difficult for humans (including myself) to really internalize the overall effects of compounding interest. I read a comment the other day in which the author was joking about how they can't wait until 2023 when they get to look back and feel how they do now looking back at 2003. It doesn't always seem that the speed at which things are happening is increasing dramatically even if that's the case. The progress between 2003 until now will be completely overwhelmed just a few years from today.
http://blog.ted.com/2013/04/23/the-future-of-work-and-innova...