My preferred medium has always been charcoal on paper, which is why I like the look of eink art so much, I suppose. Even though I have a collection of graphics tablet input devices dating back to the CP/M days up through modern tablets, I still far prefer smudging in charcoal shadows with my bare fingertips, then adding subtractive detail with a sharpened eraser. I just never got a feel for electronic input devices for my artwork. And it has been decades since I did anything with my collection of artist's charcoals and drawing paper portfolios. Some day when I get more free time, perhaps...