Seems that here are too much assumptions 
Not all users are comfortable with page source viewing, and it seems a bit strange when one has to see the page source in Getting Started section. The simplest solution - just to put the source code to the page, as it was in old docs. It will not make any harm but only good.
Well, new users have no chance to see the old docs, so they have nothing to compare with. But “old users” remember that some things in old docs were more intuitive or more comfortable to work with.
Here is my story as a new user.
Several years ago our client asked us to publish in the Web 3D model which we’ve made for him.
Inspite the fact that I’ve created more than one hundred websites in my life I’ve never did 3D Web before (we produced usual C4D renderings) so I start googling.
First I came to Three.js. I spent there maybe 4 or 5 hours reading, coding and trying to understand what I need to do in order to load and demonstrate GLTF model - but with no success.
After this I came to Babylon.js. After copy-pasting the initial setup example from Getting Started I went to the GLTF file loader doc page, copied relevant lines and pasted to my example - and, miracle! After 10 minutes (reading time included) I had working example; and, because the Babylon.js documentation is really clear and understandable, after just a week I already published my first demo at the Forum. Since then I am here
The point is that with the new Getting Started section I would spent not 10 minutes but much more time to find the basics. It is not so evident for new users now, believe me