To some extent, Emacs Lisp is the new Hackers’ Lisp, because Emacs is such a featureful, comfortable, and extensible environment. It also has a fairly vibrant community. If it only had the option of lexical scoping, guaranteed tail recursion optimization, and loaded cl.el by default (perhaps internalizing some of the routines for multiple value returns and the like), it would come very close to being the most perfect Lisp.

— Michael Olson again.