>One, my shoulder gets tired and sometimes hurts if I move back and forth between keyboard and mouse too much.
>Two, by the time I move to the mouse and back, I could have done the equivalent twice on the keyboard and moved on.
Vim got this part right, and it ends up being better than Emacs in that regard: in Emacs you also don't need the mouse but all the chording requires moving the hands too much. Ideal would be to take Emacs' non-modal editing and combine it with Vi's simply edit mode: for example, say you are in "command mode" only if you hold down Caps lock, but when the button isn't held down the editor is always in insert mode.
If using vim is wrong, I don't want to be right.
Honestly, I can believe such studies, and I still would use vim.
One, my shoulder gets tired and sometimes hurts if I move back and forth between keyboard and mouse too much.
Two, by the time I move to the mouse and back, I could have done the equivalent twice on the keyboard and moved on.
Three, there is nothing sweeter than "How did you do that?" :)