Probably, more because its a lisp, whereas Scala was more of a fundamentally new language that isn't a member of such a well-studied family, but instead was led by inspiration from lots of different places, and has a lot more work in shaking out how to reconcile those influences into a coherent whole.

Though Scala being not merely statically typed by aimed at both interoperating with Java's type system and supporting a more robust and powerful type system than Java does did pose particular challenges.