Left: Shanthi Chandrasekar, “Black Holes and Voids” (2018), handmade paper, ink, resin, 8 inches in diameter Right: Shanthi Chandrasekar, “Time Crystals – Hexagons” (2023), pen and ink ...

I use its Marker in calligraphy pen mode ... alongside the Paper Pro ($579; $629 with Marker Plus; add a $199 keyboard folio and you're talking serious scratch for any e-ink machine).