Except if you went with the "sign in with Facebook" option for third party apps. You'll be losing saved games in Farmville for instance (maybe no big deal to y

Except if you went with the "sign in with Facebook" option for third party apps. You'll be losing saved games in Farmville for instance (maybe no big deal to you but still friction for some). I would lose my Endomono fitness tracking account, that would make me pause. I'm sure there are many others, just like for Google+.