> dynamic scoping by default This is not much of a problem in practice these days. As you probably know it's trivial to enable lexical-binding for an entire so

> dynamic scoping by default This is not much of a problem in practice these days. As you probably know it's trivial to enable lexical-binding for an entire source file and many (most?) modern packages do just that. It's even on by default in the scratch buffer. Emacs is just more user friendly than most other systems when when it comes to backwards compatibility.