Thinking that any REPL is the same as Emacs feels... wrong. Same for shells and other items there. I can almost see the argument for browser, but we left user

Thinking that any REPL is the same as Emacs feels... wrong. Same for shells and other items there. I can almost see the argument for browser, but we left user customization as the default in browsers a long long time ago. To make my point a bit more concrete, the culture of lisp-machines was that the user was in full control. Curious what will happen if you type something? You can literally lookup what will happen on any keystroke or button press. Curious what code runs for a function? Odds are high that you can jump into the code for any feature and edit it on the fly. Yes, there are some native code sections that you can't do this for, but the vast majority is not that.