[rplnt]

a) What does it have to do with this post?

b) Google doesn't provide updates for Nexus phones indefinitely.

[nuclear_eclipse]

Cyanogenmod also provides many features that aren't found in the stock ROMs, like the option to modify what on-screen buttons are available, modifications to the lock screen and home screen launcher, etc

[richworks]

and their awesome theme engine. it brings a breath of fresh air to the interface. Of course, 99% of the themes found on xda are utter garbage but a few of them are extremely well designed.