Or another way to think about it is it’s the home row moving around. Each hand has a dynamic <x,y> offset, units being keys. It’s like JIT compilation for your

Or another way to think about it is it’s the home row moving around. Each hand has a dynamic <x,y> offset, units being keys. It’s like JIT compilation for your typing… Instead of having AOT plan how to hit each key, with what finger, etc., the brain just figures out which finger is best positioned to hit the key at any given time, which varies depending on context.