What in this news website would require being a complex web app? And like they said, for complex interactive parts they are not even using React! Any other in

What in this news website would require being a complex web app? And like they said, for complex interactive parts they are not even using React! Any other interactivity can be solved with few vanilla js snippets. You can easily do no refresh behavior with turbolinks like approach. I would understand if it was an actual web app, with tons of complex crud and other things.