Sure, I can do emacs with softwrapping to write my next legal contract. I can also do text editing in Word for my next LaTex document. But I wouldn't want to.
This is not an obscure distinction to make.
Sidebar: Actually I much prefer a recent Word to WordPerfect 5.1. But the question was command line tools, and WordPerfect 5.1 is a good example of a terminal based document creation tool focused on creating, well, documents. It should be easily possible to make a modern equivalent - a terminal based editor focused narrowly on the creation of the same sorts of documents Word is good at. But I don't know of one, and a tricked out emacs doesn't really get there.
The other thing that made WordPerfect great was their technical support. Free and unlimited over the phone...and they new what they were talking about and if it was a genuine bug, they would have an engineer call you back on their dime. Or at least that's what happened when I found a bug in Summer of 1992.
Microsoft Word buries its formatting. Sometimes it's easier to just nuke a file to text and reformat the whole thing than to try to solve conflicting formats overlapping.
It seems like nobody I work with even knows what styles are.
Have you used emacs in the past decade? Some of your requirements are laughable. Softwrapping? visual-line-mode has been baked in since 23. Word count? wordcountmode. Tables? I will take orgtbl mode over the libreoffice/ms-word interface any day. Bullet points? Nothing comes close to orgmode for manipulating/moving/adding bullet points.
Apple's Pages did not get "track changes" until 2012. Was it just a text editor prior to that?
Sidebar: It is kind of funny that you like WP 5.1 and are a lawyer. Were you ever a lawyer in the states? The only people I have ever heard gush over WP5.1 were lawyers. I never realized the fetish was global.