a) That hard thing should have been cut out and by definition is not part of the product. Didn't see a bridge with space rocket engines recently, as one could s

a) That hard thing should have been cut out and by definition is not part of the product. Didn't see a bridge with space rocket engines recently, as one could say. b) Most times nobody knows what is actually crucial to the user -- including the user and management. Books and theses have been written on the topic. Companies experiment until something sticks. There is always the chance a feature is unnecessary.