[tmtvl]

> many common commands (e.g. Ctrl-C Ctrl-V) are where they are because of their locations on a QWERTY keyboard

Is that a fact? I thought they were chosen because it's C for copy, X looks like a pair of scissors, and V looks like a downward arrow (for pressing what you're pasting down). Downward finger traversal (for X, C, and V) is worse than upward, which is worse than no traversal. If they were chosen for their location I'd expect S, D, and F to be used. Or perhaps J, K, and L. The only traversal that's necessary is to hit Ctrl with the opposite hand.