alt Hacker NewsI don't see a clear advantage over the the ZXCV shortcut placement which the Macintosh team chose. (The original Finder had no specific Redo shortcut because it was single-undo and ⌘-Z performed both undo and redo.) Even well-placed dedicated keys on a Xerox-style (or later Sun-style) "fun cluster" https://www.youtube.com/watch?v=pBiWtJJN5zk to the left of the alphabetic cluster would have forced the hand to move further away from the home row. Of course ZXCV is much less well-adapted to the left-handed, but that would probably be true of any dedicated keys as well, unless they were mirrored on both sides of the keyboard.
> […] left of the alphabetic cluster would have forced the hand to move further away from the home row.
The Star left cluster are primarily operations that pair the left hand on the keys with the right hand on the mouse. This derives from Engelbart's Mother of All Demos with the left-side keyset paired with the right-side mouse.