I love Common Lisp. But I don't think you can look at a list of features and decide if it's a good choice to use or if those features are now "covered" by more recent languages. Not all REPLs (for example) are born equal, and recent is rarely a good thing when picking a programming language. I don't always use Common Lisp, but when I do, I enjoy the combination, depth and maturity of many attractive features that have only recently been introduced elsewhere (like poweful macros or the ability to compile into a running program). Also, I think not knowing Lisp is in a way like not knowing any C. Regardless of what you use at work, there are huge parts of the literature and discussion about programming that are closed to you.