This phenomenon is inevitable, at least for any apps or websites that have to earn their keep. The problem is, features need to be added to expand the user base

This phenomenon is inevitable, at least for any apps or websites that have to earn their keep. The problem is, features need to be added to expand the user base and keep up with, or stay ahead of, the competition. Adding almost any feature will make the interface more complex. It's true that 95% of the users don't use the more complex features, but product reviews and corporate purchase decisions are driven by the feature set.