It's convenient for integrating with backends. You can use async/await on the server, no need for hooks (callbacks) for data loading.
It allows for dynamism (user only sees the menus that they have permissions for), you can already show those parts that are already loaded while other parts are still loading.
(And while I prefer the elegance and clean separation of concerns that come with a good REST API, it's definitely more work to maintain both the frontend and the backend for it. Especially in caes where the backend-for-frontend integrates with more backends.)
So it's the new PHP (with ob_flush), good for dashboards and big complex high-traffic webshop-like sites, where you want to spare no effort to be able to present the best options to the dear customer as soon as possible. (And also it should be crawlable, and it should work on even the lowest powered devices.)
It allows for dynamism (user only sees the menus that they have permissions for), you can already show those parts that are already loaded while other parts are still loading.
(And while I prefer the elegance and clean separation of concerns that come with a good REST API, it's definitely more work to maintain both the frontend and the backend for it. Especially in caes where the backend-for-frontend integrates with more backends.)
So it's the new PHP (with ob_flush), good for dashboards and big complex high-traffic webshop-like sites, where you want to spare no effort to be able to present the best options to the dear customer as soon as possible. (And also it should be crawlable, and it should work on even the lowest powered devices.)