> Moving your arms, yes, but not your wrists!. Unless you want a row of keys stretching six times as wide as a standard keyboard, we are talking about entirely different movements here.

Not really. It's the obsession with home row that creates wrist-twisting.

> What we really need to do for PC keyboards is split the keyboard into two halves and get rid of the typewriter column stagger.

I'm self-taught and instead use the edges of the keyboard to orient myself, and use my shoulders and elbows to move my forearm inwards from a very different resting positing. Not much wrist movement.

(for anyone curious, my usual resting keys are around shift/a/w/d/space and alt/l/p/[/] on a US qwerty keyboard, but it's not strict)