I love that we're rediscovering server side rendering. It's impressive to me how quickly the industry moved away from it as the default and is now an interesting, new technique to many.
Did you think your browser was assembling the HTML?
But anyway, regardless of what you want to call it: this whole thing is just a silly exercise to get a bunch of XML and transform into (X)HTML. If it works for them... ¯_(ツ)_/¯