An addition to great points already made in this thread- in Emacs it might take a while to set up your environment to your liking but once you have done it you

An addition to great points already made in this thread- in Emacs it might take a while to set up your environment to your liking but once you have done it you can use it for _everything_. From writing code to managing your agenda to writing haikus. As a user of Dvorak keyboard layout that alone is invaluable to me since I always have my shortcuts optimized for Dvorak no matter what I'm doing.