Is 2 spaces really a recent obsession? This is just what emacs (and ancient emacs-likes) have always done, and how all the Lisp code (excluding that by newbies

Is 2 spaces really a recent obsession? This is just what emacs (and ancient emacs-likes) have always done, and how all the Lisp code (excluding that by newbies and in fringe dialects) has been formatted. CL best practice, formatting wise, is 95% just to let emacs do what it does by default.