Interesting article, I'll admit when I first saw the title I was thinking of a different kind of "scaling" - namely the client/server decoupling in X11.

I still think X11 forwarding over SSH is a super cool and unsung/undersung feature. I know there are plenty of good reasons we don't really "do it these days" but I have had some good experiences where running the UI of a server app locally was useful. (Okay, it was more fun than useful, but it was useful.)