It's well known that !! is a sweet little helper in case where you forgot to sudo a command. However, I find that for those cases I usually use `Up-arrow CTRL-A` to get the previous command and then go to the beginning of the line where I can type `sudo`. Is there any reason to prefer the !! variant?
If you're on a non-interactive terminal. Some of us didn't throw out our teletypes. Also: when rooting boxes often one lacks space in the exploit payload to set up the tty line discipline.
I think it's faster than a cycle of :p, verify it's what you want and then reexec. It's also mentally less taxing (albeit a tiny amount). But summed over a day of shell work, I think it makes a difference.
