Clojure has some nice syntax and conventions for dealing with sequences, vectors, maps, and sets, such that it encourages working with those data structures unt

Clojure has some nice syntax and conventions for dealing with sequences, vectors, maps, and sets, such that it encourages working with those data structures until performance requires something more specialized. It also has some very well thought out mechanisms for concurrency. I would think these things could be implemented in Racket. In fact, I would love to see a Racket implementation of Clojure (minus the JVM bits) that was nicely integrated into DrRacket.