Simplicity is subjective. Any given interface may feel simple to some users while complex to others. The objective of interface design shouldn't be to make thin

Simplicity is subjective. Any given interface may feel simple to some users while complex to others. The objective of interface design shouldn't be to make things "simple" for the sake of it. The objective of interface design should be to allow the highest number of users to achieve the goals they have, while keeping in mind how frequently they want to achieve that goal. Iconography, for example, works pretty weel for frequent tasks, but it may fail when the user is only doing a given task once in a blue moon. When in doubt, and in the spirit of pursuing objectiveness, split A/B testing works pretty well.