The "Add Playlist" example is a case of "why not both?" One potential answer is that while two possible actions may be obviously equivalent to the designer, th

The "Add Playlist" example is a case of "why not both?" One potential answer is that while two possible actions may be obviously equivalent to the designer, that is not necessarily obvious to the user. It's a classic usability problem: the designer tries to be helpful but in reality there is now a confusing variety of similar-looking ways forward, and then the user gets analysis paralysis and gives up. The mistake is often compounded by having equivalent things look slightly different, for example using different types of controls, or using slightly different terminology or phrasing.