I find that the only reason for SSR existence is to be able to just move a JS frontend to the backend for SEO/client performonce reasons with almost no effort. If the frontend really needs to be highly interactive then yeah, a FE framework makes things easier. But then you are locking yourself to using JS in the backend. Voluntarily locking yourself to use an objectively bad language.
Then there are the react/angular/other people, who build everything in these frontends.
I really hope tools like htmx gain traction, since it looks like a model able to solve the current JS madness.