[post-it]

I've never felt nagged. Every time I get one of those popups, which isn't too often, I think "neat, good to know."

It's inconvenient that apps can't do long-running operations in the background outside of a few areas, but that's a design feature of the platform. Users of iOS are choosing to give up the ability to run torrent clients or whatever in exchange for knowing that an app isn't going to destroy their battery life in the background.