If you have nothing productive to say, don't comment. It really is that simple.
And Racket is almost a decade older than Clojure.
If I had a nickel for every time I've shown someone Racket and they half-assedly respond, "Oh like Clojure"... We should be better than this as a field.
...and if you had a single clue about all that you'd know that Racket and Clojure are very different and that Racket is a strong player in the academic world.