i only know about racket because Carmack was doing Oculus stuff with it once 10 years ago:
https://youtu.be/ydyztGZnbNs?t=412
HN is written in Arc, and Arc is (was?) written in Racket.
https://en.wikipedia.org/wiki/Arc_(programming_language)
It was actually ported to a Common Lisp based implementation a while back.
https://news.ycombinator.com/item?id=41683969