Android 4.4 (KitKat) update for Nexus devices

Android 4.4 (KitKat) update for Nexus devices - Nexus Help:

The new Nexus 5 comes with Android 4.4 pre-installed.

Nexus 4, Nexus 7, and Nexus 10 will be receiving the Android 4.4 update.

Galaxy Nexus will not be receiving the Android 4.4 update. 

Galaxy Nexus, which first launched two years ago, falls outside of the 18-month update window when Google and others traditionally update devices.

Fixing the Nexus 5 (camera): with a new version of Android, Google tackles the camera | The Verge

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Android is not like Windows. No support for "older" devices... 

You get what you (don't) pay for... a free OS, not much support...