That would necessarily move it off the bootclassloader, for one. Clojure uses it because it's the only sane time instance in the stdlib. It is not an uncommon

That would necessarily move it off the bootclassloader, for one. Clojure uses it because it's the only sane time instance in the stdlib. It is not an uncommon class to use for that reason; the underlying reason is that j.u.Date sucks.