I think your understanding may be a little biased. This kind of template engine just shows that the html returned by the backend has been processed by the template engine and contains the backend data. Apart from that, there is no other restriction on how you want to jump between pages, which is not affected by the template engine at all. For example, you can still use spa to develop single-page applications, or even embed vue, in the html returned by the backend. There is no problem with using vue to develop some front-end pages.