I am probably misunderstanding the article, but as far as I can tell, the two ways discussed are "JSON API like almost everybody does" and "do server-side rendering and call it the API".
Not to say it's wrong to do server-side rendering of the frontend, but I got the impression that the article wanted to make a distinction that I'm not seeing.
Not to say it's wrong to do server-side rendering of the frontend, but I got the impression that the article wanted to make a distinction that I'm not seeing.