For plain text, I still find my quickest editing is done with vi. My theory is that vi commands were designed to be brutally efficient over a slow link (RS232 or 400 baud modem) and as a side effect, you can do a LOT with minimal keypresses (e.g. 5dd to delete 5 lines - try doing that as quickly in Word or Notepad). It also helps that your fingers don't have to leave the keyboard, vs a GUI where you're constantly switching hands from keyboard to mouse. Of course, I learned touch typing on Amstrad 8256 & 9512 machines, which always helps typing. Very glad I did that all those years ago, even if I was very much in the minority in the class as a boy.