...and this is really what it comes down to. State management should come down to what the front end has to manage in order to be well-organized and structured.

...and this is really what it comes down to. State management should come down to what the front end has to manage in order to be well-organized and structured. By creating a multi-page app, all you are doing is forcing yourself to organize your state by page. This is something that can be done simply enough by using modules in your state manager of choice. With a SPA, you have the option, with MPA, the decision of overall organization has already been made.