Flat is better than nested only when you're dealing with limited space. You can put as many buttons on a washing machine as you want, but an iPod needs to maxi

Flat is better than nested only when you're dealing with limited space. You can put as many buttons on a washing machine as you want, but an iPod needs to maximize its real-estate. Therefore, nesting becomes the optimal choice, but it has to be intelligent nesting. Features need to present themselves when it makes the most sense based on the current context. On your GF's iPod, shuffle is very easy to access when you're currently listening to a song. Otherwise, it's hidden away.