Does your app use too many modal popups? If you use them for more than confirmation dialogs, it does. Many apps will display a modal popup to complete a task flow. However, this common practice leads to a poor user experience on desktop screens.
Consider the task flow for creating a new project on an app. When the modal popup displays, not all the elements are in view on the screen. The user must scroll to the bottom to click the action button. This extra work adds more time to the task and decreases efficiency.