My (half-serious) take on this is that LISPs are too easy. A lot of little things that are hard in other languages are easier in LISP, which results in you writ

My (half-serious) take on this is that LISPs are too easy. A lot of little things that are hard in other languages are easier in LISP, which results in you writing the code yourself instead of pulling in a library some else wrote. This greatly reduces both the need and offering of a package manager which usually plays an important role in establishing a ecosystem and community in other languages. In all seriousness, I think that package managers play a big role in the success of modern languages, espcially if the package managers are there from the beginning. As far as I'm aware Clojure was the only attempt at a LISP where a package manager was included from the beginning.