Irreal is always gathering examples of why and how Emacs can help you in your coding and writing endeavors. Regular features of those examples are Org mode, Magit, and, more recently, LSP. It wasn’t always like that. I’ve only been using Emacs for about 17 years but even I can remember not having Org or Magit.
Still, even in those prehistoric days there were plenty of reasons to use Emacs. Back in 1991, Bob Weiner wrote a paper on why you should use Emacs. A lot of the things we take for granted were not yet available. There was Dired and Gnus but the idea of Emacs as an environment you could live in was still nascent.
His paper made me realize that as nice as things like Org and Magit are, they aren’t the reason you should be using Emacs. Rather, it’s the core editing and file management capabilities that make it so useful as an editor. At the end of the day, it’s all about writing your code or prose as efficiently as possible, and Emacs excels at that.
It’s interesting to read about the reasons to use Emacs before the more recent functionalities were added. As nice as those functionalities are, Emacs is really all about efficient editing. That’s why they call it an editor.