Is the programming language Racket used in the real world?

I’m learning Racket in a class now. I like it because it’s simple, but many people complain that the skill doesn’t translate well to learning other languages (the syntax is very different from C++, which is the only other language I’m familiar with), and that Racket itself is not a very useful language to know because it’s not used in the “real world.” Are there real-world applications for Racket? What are they?