Comment VI assumes Querty layout (Score 1) 624
I tried to make the switch to dvorak a while ago, and I found I got good pretty fast at typing text and word processing documents.
By far the worst part though, were commands like ls -al which are very hard to relearn with a different layout. The show-stopper, however, was using VI. Vi assumes that you're using a querty layout, because the keys in command mode (like hjkl for left/up/down/right) aren't in logical positions when you're using a different keyboard.
So until there's a widely available 'dvorak-mode' for Vi which reassigns the command mode keys to be whatever the old querty key in the same place would have been, I'm sticking with querty.