Except there is a problem: serious writers need more than 'minimalism'.
All the authors and novelists and long-form fiction writers I know have reams upon reams of notes, plot information, and character data cluttering up their MS Word (argh) and Scrivener screens. I even know some to use spreadsheets to keep track of complicated family trees and plots in long fantasy novels.
This is why I use Scrivener. It's bulky and far from minimalist, but it has the tools I need.
Minimalist apps are for people who want to play 'pretend' at writing. Or write a blog post a day and call that 'substantial writing'. But if you really, really need to put together a story, you will need to do your research. And minimalist apps are of no use to you then.