It struck me the other day that there is probably more variation and diversity among different users’ Emacs configurations than among the configurations of any other editor. Users are able to change almost any aspect of the way that Emacs functions, with easy access to clear documentation explaining how it works right now, and how you can change it. This means that each instance of Emacs ends up a unique shape, like an old tool with a wooden handle worn down into the shape of its owners’ habitual grasp. That simile doesn’t quite work, because Emacs users work hard and deliberately to shape their Emacs tools to fit their needs, so it is more than just passive wear.

https://www.rousette.org.uk/archives/on-the-emacs-from-scratch-cycle/#:~:text=It%20struck%20me,just%20passive%20wear. #emacs