I spent hours setting up the logic for one of our questions. I wanted to then duplicate what I had done to use three more times in the form. I found out, I have to re-create the 15 rules of logic over and over for each of the same/similar questions.
For example: The form is for customers wanting to start a project. We ask them what product they want to create first and have logic pull different questions for each product. Often, for one project, the customer may want to do two to four products under one project. This is where being able to duplicate a question with all the logic included is invaluable.