[jdowner]

It's not for me. I can see the appeal of these shortcuts, but I can see it being a wtf down the road once I've forgotten that I have them in place.

Also with something like auto-correct, you have a visual affordance that alerts you to the change (with the option to override), which just happened when I misspelled 'forgotten' above. The shell doesn't have that so something just happens without any actual correction or indication the user may have made an error. Although I am not a 'fish' user, this is something that I think it does well.