I have handled far more complex cases than this using desktop based GUI apps in a client-server model before the word AJAX etc was even invented. Example: depen

I have handled far more complex cases than this using desktop based GUI apps in a client-server model before the word AJAX etc was even invented. Example: dependent dropdowns or even tables with row-selection leading to more detailed views. The ability to display multiple views for the same data type at the same point - example: displaying orders from multiple clients simultaneously in two different sub-screens at the same time. Also, MVC as a concept has existed for decades. GUI controls have always had a concept of a "onChange" events and when it came to the code which fetches changes from the server, there were multiple ways of handling that - from using polling, to using message queues to using db triggers, from using plain socket calls etc. And also very sophisticated applications with literally 100s of screens - example: plane/hotel ticketing apps, stock trading applications, ERP/MRP software etc, have all existed for decades.