Nexus 5 support also on hold for the time being
The poor Galaxy Nexus just can't catch a break. It, along with the Nexus 10 and the 2012 version of the Nexus 7 have been dropped from Ubuntu Touch support by Canonical. Also, support for the Nexus 5 is on hold. Of course, the question everyone has is why.
Alexander Sack explains on the Ubuntu-phone team mailing list. The folks behind the project want, and need, to narrow their focus as we get closer to the 14.04 release, which has always been planned to unify the desktop and mobile under the same code base. For now, all focus is on the emulator, and the official target devices will be the Nexus 4 and the 2013 Nexus 7. There seem to be no technical reasons why the Nexus 5 isn't going to move forward, it was a matter of engineering costs. Sack leaves the Nexus 5 on the table, but notes that support won't be considered until 14.04 is released.
While none of this makes anyone happy, it does make sense. Software engineering isn't easy and it doesn't come cheaply — there are plenty of costs in building your "free" operating system. If you have Ubuntu Touch installed on your Galaxy Nexus, Nexus 10 or 2012 Nexus 7, they won't stop working overnight, but don't expect any device-specific updates or bug fixes. Chances are the community can keep the current system running. And you'll just have to enjoy Kit Kat on your Nexus 5 for at least a while longer.
Source: Ubuntu-phone mailing list