&gt;<i>btw, your question assumes that Common Lisp is not evolving. This is not correct at all. Which improvements Clojure evolving consists of?</i><p>Traction for one.<p>&gt;<i>Transducers? Cl got them too</i><p>Pointing to some random libs that implement the same concept doesn&#x27;t mean it&#x27;s part of a languages culture&#x2F;ecosystem&#x2F;common practice as transducers are to closure.<p>E.g. I could say &quot;Rails? Well, language X has a rails like framework too&quot;, but that wouldn&#x27;t mean you get the same benefits of using that framework over rails, when you include language adoption, community vibrancy, availability of programmers to hire, tooling, books, etc.