This is very cool. My two favorite languages are Clojure and PHP. Do you implement persistent data structures? (totally cool if not, just curious) Is Phel a s

This is very cool. My two favorite languages are Clojure and PHP. Do you implement persistent data structures? (totally cool if not, just curious) Is Phel a subset/superset of Clojure? Perhaps a list of "differences from Clojure" vs "implemented features" would be useful for people looking at Phel.