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Perhaps this is a lesson in the importance of diversity for the bottom-line.
Support from the SoC vendor is the first step in getting an update out the door, and you'll see many phones' support lifecycles cut short thanks to the likes of Texas Instruments and Nvidia. The Galaxy Nexus used a Texas Instruments OMAP 4460 SoC. TI quit the smartphone business in 2012, leaving Google's flagship without support for KitKat. The only device we've seen update to KitKat without support from the silicon vendor is Google Glass, which uses the same chip as the Galaxy Nexus. If the incredibly buggy performance of Google Glass post-KitKat update is any indication, though, that was an experiment that went very poorly.
The speculation is Google Glass will be switching to Intel for the next iteration. There's a reason why many of the mass market mobile device players such as Apple and Samsung have invested in their own ARM SoCs. There is in fact an uncanny correlation between mobile device companies selling hardware having catastrophic collapse of market share such as Nokia and Blackberry with failure to develop an ARM SoC for the 2010s and beyond.
One must remember in 2008 the tech press was reporting that it was Qualcomm that was on the ropes due to its IP steadily decreasing in value. But Qualcomm, whose CEO was a Ph.D. in EECS from Cal Berkeley, invested in developing their own ARM SoC as well as LTE baseband chips and bought AMD mobile graphics division for a complete smartphone solution. Meanwhile Nokia invested in neither a modern ARM SoC, unlike Apple and Qualcomm and Samsung, nor in LTE baseband chipsets, nor in foundry relationships unlike again Apple, Qualcomm, and Samsung.
Nokia the phone company was a dead man walking in 2008 long before Elop got there.