The original post is right: Lisp by itself is an incredibly powerful yet incredibly basic language. It's a functional Assembly for declarative DSLs. The most talked about Lisp nowadays is arguably Clojure, and this is probably so because Clojure provides much more built-ins and libraries out-of-the-box than other Lisps, where you'd have to build these things yourself. At the end of the day, we just want to call "solveMyProblems()", commit that 1 function call, and move on to our next project. The lower-level a language is, the further away from that goal it is, and the less reasons there are to use it.