With every smart phone I've had, I've noticed that speed has slowed over time just as it does with a PC. I'm sure that this has to do with the number of apps installed and with how many run in the background. What is more important to you, keeping performance up or having lots of apps?
Also, what apps in particular seem to slow your GNex down the most? Did you keep them or uninstall them?
Also, what apps in particular seem to slow your GNex down the most? Did you keep them or uninstall them?