Just feels like you're halfway following good JS practices. Ex: using Vue is great, but still rendering templates the "old way" instead of server rendering correctly for the whole app and having components remount. Totally get your point :)
I don't disagree but the real power of Vue is that you can immediately start using it in your existing application without having to jump to a full SPA. Vue works just as well when added to a single page or feature in an existing application as it does in a full SPA