That's because emacs can already do anything, if you're willing to learn how. Still though, it's not a very useful thing to say.
On the other hand the features described in the page I linked are mostly already built into emacs, at most you need to flip a couple customization switches to get the same idea.
Basically: remove the toolbars, enable ido-mode, use tramp for remote editing. The splitting thing is built in although you'll need to redefine a couple functions to get the exact behaviour shown in the gif (nothing very fancy though).