"You don't have to like Emacs to like it" -- this seemingly paradoxical statement is the secret of GNU Emacs. The plain, `out of the box' Emacs is a generic tool. Most people who use it, customize it to suit themselves.
GNU Emacs is mostly written in Emacs Lisp; this means that by writing expressions in Emacs Lisp you can change or extend Emacs.
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