The argument that there is a tradeoff between simple/useful is something I don't agree with. An app or website can and should still remain simple to use whilst

The argument that there is a tradeoff between simple/useful is something I don't agree with. An app or website can and should still remain simple to use whilst having many features if the UI is designed well. Simplicity should always be the end goal but this should not be at the expense of features!! There seems to be a certain mindset where people believe that minimal, or simple interface design is the 'easy' option. It is not, it's often the opposite. Good design ensures an end result always feels AND looks simple to use for the end user. The features added to a service should never be considered, or be resolved in a way where they could be described as 'clutter', as you label it. I'd consider that a fail if I looked at a new feature that way. If the features are implemented well by a good UX/UI designer, the products perceived 'simplicity' will not be compromised, in fact it would probably be enhanced if it were providing added flexibility.