I use emacs+org for writing fiction. I usually start pen+paper first, handwrite the first draft, and then rewrite in emacs (I recently started scanning them into pdfs and using that instead of just reading them off the paper, readd helps with bad posture and neck pain in long sessions). Pen and paper is way more portable than the smallest laptop with a good keyboard, way more comfortable to write in than the best tablet, easy on my eyes, and no frills or other distractions. When I digitize it into an org mode file, it also becomes a first redaction of the manuscript, and allows me to catch many more errors than if I composed in emacs in the first place and re-read. I use org-mode comments as editorial notes.
I also like how it doesn't make me think about formatting, layout, pages and whatnot. It's just a single digital papyrus scroll. If I need to store separate notes about the text, than I put the text under its own section, and make another section named notes, and write it there.
That looks interesting, but I don't think it'll work for me, as I write in multiple languages and my main one (turkish) is agglutinative, so false positives would be many (it's really bad with aspell too, so I don't use it). I do use abbrevs though, I've added this function and mapped it to SPC to make it work seamlessly:
I also like how it doesn't make me think about formatting, layout, pages and whatnot. It's just a single digital papyrus scroll. If I need to store separate notes about the text, than I put the text under its own section, and make another section named notes, and write it there.