> Hunting and tapping through menus on a touchscreen is, by nature, going to be slower then having your left hand ready to hit the undo command at a moment's notice.

I’ve seen DJs and other performance-artist using mixing software that actually spreads its control UX over several tablets. I wonder why no professional studio program has copied that?

(I’m not suggesting you’d need to own, like, five iPad Pros. More like one iPad Pro to draw on, and then a pile of random $100 Android tablets each showing one palette window.)

I think I did once see a demo where someone had a second iPad that acted entirely as an painter’s palette for the drawing on the primary iPad. And I mean “palette” literally: it was a canvas to smear and mix literal paint blobs around, with accurate optical results, which you could then sample with a brush tool, or take a cut of with a painting-knife tool.