See, I'm both typing and writing for more than 30 years, and I started doing both almost the same time, so there's no inherent bias there. Here's what I found.

- I can type around 75 WPM in a good day, yet writing on paper always brings out clearer ideas.

- I write my blog posts in iA writer, fullscreen and in DnD mode, yet drilling some ideas on paper is still necessary for reflection.

- I have encrypted diary on my personal computer, yet I always prefer to carry a good notebook with a good pen, and find that I can write more sincerely and drill into myself better during reflection sessions.

- I can design programs in my head, brainstorm with mind maps, or draw architecture diagrams with relatively high speeds, yet designing on paper always results in better architectures, less bugs, and better performance.

- I can skirmish in real time like an old IRC person (because I am), or fire salvos of posts with different amount of flame included (because I lived through newsgroups), yet I prefer elaborating ideas on paper or in silence before writing them, because seeing what I want to say, and scribbling them with a good pen always brings different perspectives.

What I found by working on myself is ironically parallel to the research you denounce. Writing is different than typing and is a deeper experience with more connection to self. Having a small notebook around boosts my productivity 5x, while reducing planning overhead and mental load incurred by it to almost zero, and this is while I have a tool which I plan my next three weeks with great detail.

So, maybe you should try writing, and while you're at it, you can even find a pen friend which spends a couple of hours to write you a nice and sincere letter, and you'll do the same and understand why some of us like writing and everything related to that.

Who knows?

you don't know how sacred to me is my scratch (temporary) file on Emacs or my org documents or Gimp files with stuff like studies of games platform level design (quite easy to screenshot views and highlight stuff i want to comment) or digital collages material

for me there isn't anything closer than having a coffee after weeks/months without having one, Android running Emacs on Termux in my pocket and going for a walk with or without a science podcast playing... ironically the last thing i did on paper was the tinker of specific apps layers layouts on my keyboard (now i use an online keyboard editor alongside a text document)

I can understand the value of a good digital data storage. At the end of the day, I keep public and private personal knowledge bases for myself. However, I don't like to spread my information over many applications, and currently shrinking everything into a couple of tools. See, decades of computer use creates a lot of clutter.

On the other hand, I don't like to keep notes under the sun on a screen which needs a shade, and powered by a battery which might die any second. We're also different in noise regard. While I like to read and listen a lot, I much prefer silent walks since it allows what's beneath to surface.

This will be a bit personal, but you seem like a bit tense. Maybe you should slow down a bit, and listen what your inner voice says to you. I have a hunch that there's something you should see and give a good listen.