Enlarge / The Nexus 5X (left) and Nexus 5 (right) will run the same software no longer. (credit: Andrew Cunningham)

Neither device was supported by the Android N developer beta builds that Google has been releasing all summer, and both are past the point when new major Android updates are guaranteed (July and October of 2015 for the Nexus 7 and 5, respectively). But the beta support list is not always indicative of the final support list. Google has provided updates outside of that 18-month window before.

Google provides its monthly security patches either three years after a device’s release date or 18 months after the end of general availability, whichever is longer. According to the dates listed on Wikipedia, that ought to cover both of them until October 2016 or so, at which point both devices may be left behind for good.