Apparently there is such a thing as "too many apps".
From the article: http://www.forbes.com/sites/timworstall/2012/07/20/apple-ios6-you-can-have-too-many-apps/
The beta versions of Apple’s iOS 6 limit the number of apps that you can have installed on your iPad, iPhone, or iPod touch – a limitation that didn’t exist on iOS 4 or iOS 5.
The limit, however, is high enough that only the most app-happy Apple-kit owners would hit the wall, according to a post by “macjeff” on the Mid Atlantic Consulting Blog.
According to macjeff, who says that his discovery was confirmed by Apple, once your iOS 6–equipped iDevice has over 500 apps installed on it, you will begin to experience “slow booting, auto-rebooting, and other issues.”
Exceed 1,000 apps and your beloved shiny-shiny won’t even boot at all. You’ll be forced to restore it to factory settings.
From the article: http://www.forbes.com/sites/timworstall/2012/07/20/apple-ios6-you-can-have-too-many-apps/