Sources for these claims on what the vast majority of people want? Either way this is a terrible excuse. It implies that you necessarily have to sacrifice good

Sources for these claims on what the vast majority of people want? Either way this is a terrible excuse. It implies that you necessarily have to sacrifice good list support in order to promote discovery and other features. They are not mutually exclusive. As a consumer I don't think it's too much to expect a good playlist UI in a major product like this, especially coming from a company that prides itself in delivering good user interaction.