I think Emacs still does all of this; the argument the author makes is that it is "arcane", it just uses conventions he is not used to. It is however fully self-documented and interactive. For me the best textual interface I've ever used remains Magit in Emacs: https://magit.vc/ I wish more of Emacs was like it. I actually use emacs as my git clients even when I'm using a different IDE for whatever reason.
> It is however fully self-documented and interactive. Unfortunately not true. I've fired up emacs once or twice, and couldn't even figure out how to save a document because it didn't show me how to do that. It might be more documented than vi (but that bar is *on the floor, vi has one of the most discovery-hostile user interfaces ever made), but it's not self-documented enough to just pick up and use with no instruc…
If they just plop you in front of a 3-d printer never having seen one and having no documentation, it'll probably take you a good while to produce something useful with it.
All good tools require training & experience.