Looking at the keyboard layout makes me wonder. How many devs here actually use the right shift key and/or the right modifier keys? I've been programming for 20 years (15 or so using emacs) and I exclusively use the left shift and left modifiers. I probably have never used the (physically) right shift/modifier keys on the keyboard I'm currently typing on that I've had for 2 years. I loathe the four left modifier key…
Why would that be common? I ask because I also don't use the right modifier keys, but that's because I got in the habit years ago on a keyboard which forced me to do it that way.