My experience with software updates - on phones or desktops - is that I'm presented with the option to perform the update at the very instant that I need to use

My experience with software updates - on phones or desktops - is that I'm presented with the option to perform the update at the very instant that I need to use the device. And since it was working fine (for my purposes) before the update, I'm not likely to stop what I'm doing right now. My MacMini media machine at home is several releases behind current Lion releases because its screen is only visible when I want to watch a movie, and the rest of the time its playing music, controlled via the iTunes remote.