> The only keys that exist twice on the keyboard are...

I wouldn't take "the standard 104 keyboard layout" as a respectable design.

- If the modifier keys exist twice, then why aren't they placed symmetrically?

- Most users use a mouse with the right hand; yet the numpad is placed on the right side of the keyboard (which means it's even further away). e.g. placing keyboard in front of you in the screen then means the mouse needs to be way off centre.

- That the letters remain asymmetrical shows adherence to tradition/familiarity over improving a good design.

- The spacebar doesn't need to be >6x the size of other keys.

- Caps Lock can be useful but isn't significant enough to be worth putting where it is.

I mean. I can agree with distinguishing "Return" and "Enter". But I wouldn't refer to the typical keyboard layout as if it's a well thought out design.