I hate the fact that apps are not retained in memory long enough. They always start over. Also, launching an app from the home screen launches a new instance instead of resuming the current instance.

Notifications are even more terrible. There's no way to access previous notifications. There's no central place where all notifications live. You can't access them from the lock screen.

Yes, all these are quirks I've found as a tech savvy user. Because of these reasons, I cant see myself ever using WP.

Besides, just the fact that you cant run unsigned applications (and there's no viable "jailbreak") is an instant turn-off for power users. So, to suggest that these people will leave Android is hilarious at best.