The major contribution of Clojure is not that it's a Lisp; it's that its model of immutability-by-default eliminates whole categories of errors due to shared mu

The major contribution of Clojure is not that it's a Lisp; it's that its model of immutability-by-default eliminates whole categories of errors due to shared mutable state. I personally also enjoy having non-parenthesized literals for things like maps and sets, but those are incidental benefits.