Emacs lisp is a terrible lisp dialect. If it wasn't for Emacs' popularity it would have died decades ago. This is just one example in a long line of examples where nobody willingly implements Emacs lisp. Even in Emacs there is pressure to move towards Common Lisp.

Emacs lisp has, as far as I can tell, no advantages. It isn't especially good at text editing. It introduces differences from more popular lisp dialects. Anything it offers could be a library in some other lisp.

Clojure on the other hand, has a couple of nice syntax innovations and smooth default data structures.