Yup, got my Nexus 5 and took absolutely everything off my cappy. It now runs cyanogen 10.1, only play music, calculator, calendar and phone (only because deleting it causes fc's) are left on it. Works fine, and leaving it on airplane let's it last a few days of listening.
If anyone ever needs a phone it's there for them, just gotta defrost and pop in their Sim card.
Sent from my Nexus 5 using xda app-developers app