While I love working with "just text" on desktop, that's a sub-optimal approach on mobile
For example, I use Obsidian on desktop with markdown files, use Vim to edit it, and it’s great. I can type quickly, dictate, edit properties, etc.
On mobile, on the other hand (ie, iPad, phone, etc), plain text is painful. Special characters are buried, and it’s much easier to do a few taps to random places on the screen than it is to type out a handful of characters; precisely the opposite of when I have a keyboard.
Another interface is a pencil. Great for writing text, not so much for complicated symbols. This is an in-between of keyboard and touch; you have high precision with text, but for more complicated operations, it’s still easier to tap a button than doing a series of keystrokes.