One of the major benefits of the Single Page App (SPA) or REST API based development model is that there is a clear separation between the backend and frontend

One of the major benefits of the Single Page App (SPA) or REST API based development model is that there is a clear separation between the backend and frontend (teams). And as long as they've documented their interfaces properly, they can afford to keep the communication to a minimal level. This isn't true in case of MPA development using frameworks like laravel, django, flask, etc. because the FE and BE are intertwined a lot in that case.