Sometimes we just want to focus on writing and hope it looks easy to use (normal user friendly).
So maybe can build a mode or theme called "Zen" (禪), help users to immerse into the writing world.

It will only use font-size, few font colors (4-6) and font-style, font-weight to layout the markdown.
No code folding, no line number, no split preview (consider itself a result).

Feel free to comment any ideas!