When it comes to front-end frameworks, scalability comes in two ways. Expanding a single-page application (SPA) and adding more pages to traditional MPA.
React is lightweight so that you can use it in multi-page applications. Facebook does so on most of its pages. You can import the library and start to add JS features with React components. It‘s well-suited for large SPAs (just look at Facebook’s ad console).
While starting your project, you may need third-party form packages and routing solutions (e.g., Flux and Redux). You can use a scaffolding tool called create-react-app. It would help you build your project, set up a local development server, check code for errors, and run e2e/unit tests.
It’s a bit inferior to Vue CLI, as there is a little customization when creating a project. It just has one project template, an SPA. However, Vue CLI has a great range of templates for all occasions. Plus, there is no option to import your own or community-created templates.
On the other hand, Vue is excellent in creating interactive multi-page apps. It lets you quickly import the core library and inject Vue into existing pages. There is no need to use components for simpler features also.
Vue CLI helps you start building a new project in no time. It provides scaffolding, and you can use them with build systems like Webpack or Browserify (or no build system at all).
You have to install additional packages for routing and form validation. Flexibility increases in installing project dependencies as plugins down the road. You can simply update a plugin without bothering about changing or configuring the stacks even if some standards change.
So, Vue may be well-suited for developing large SPAs, but it wasn’t for the specified purpose. Reusing HTML templates is a pain as compared to JSX syntax as the project grows.