The separation of front-end and back-end means that the back-end encapsulates the data in a URL address, and the front-end only needs to use ajax to request. Separation is possible without a framework. vueangular is born for development efficiency.

In the future, basically all web pages will use a front-end and back-end separation architecture, but now most companies still develop front-end and front-end mixed development. It also depends on what kind of company you want to go to. For large companies, for Development efficiency is basically all about the separation of front-end and back-end, so it doesn't mean that you still have to learn Vue and other front-end things.

Advantages: Good performance, simple and easy to use, single-page application with front-end and back-end separation, good user experience. Disadvantages: Vue is for single-page applications. Although multi-page applications can also be made, they are not flexible enough.

You have said that the front and back ends are separated, so there is no need to embed Vue in the PHP code. The front-end and back-end use pure interfaces to exchange data. Find a back-end colleague to define the restful interface and know the returned data structure. Then you can develop the front-end by mocking the data yourself.