Re: "combined with low usage"
Good points! Also, I'm glad you mentioned this feature on iOS. I literally got my first iPhone yesterday at lunch, and when I arrived home my phone already knew my airport password. At first I was a bit shocked; "how the hell did you do that?!" Now it makes perfect sense; my work Mactop knew the password for the home net, it left that nugget in the iCloud, then the new phone grabbed the nugget from the iCloud over the 4G cell net, updated it's config, connect to my wifi, and made me thunk and thunk until I got it. :)