[runeblaze]

It's not that weird -- your next AA game or AAA game will probably not use it, but in React (reducer, or Redux), very interactive stuff, immutability is often seen.

Also Clojure has better performance prospects than Ruby and Python, both have seen "real" usage in commercial indie games.

[Jare]

It's a lot easier to embed Python than Clojure. Oldest examples I recall are Severance: Blade of Darkness by Rebel Act Studios, and (coincidence, nothing to do with the previous) Blade 2 by Mucky Foot, about 25 and 22 years ago.