Is the modal under utilised in app development?For example the modal UI element is supposed to only be used for simple confirmation, forms or alerts as they usually operate within a small window and are used to obscure the background information from the user. Why is it that the modal is limited to such use? Is it possible to have an easy to use app that has modals within modals?
|Modal's within modal's or is that crazy talk?|
So why is having different pages/views considered better?When you have a new page your user transitions away from the content they previously were connected with and now are focused on the next content. The concept is based around that the user is moving towards an end goal, so showing a modal for each step along the way would clutter the screen but also make it seemingly complicated to back out to the previous step.
|Your user's don't want to feel like this is their workspace.|
The other option for this case is to still maintain the connection would be to dynamically update the UI when a user presses 'Add' or 'Edit' line item, so no modal is used and the user still is connected to the object. They are just simply loading in the related content as they traverse the page of the app. This is the best option but sometimes if designing for mobile devices there is not enough screen estate to do so without it looking crowded.
It is a case by case basis where modal's are relevant, (just like with every other design choice) the user is the ultimate deciding factor as they may be more comfortable with having multiple windows on screen at once knowing that with a few closes they are able to get back exactly where they started without changing pages/views.