[dkersten]

I'm also a longtime Clojure user and I barely use Java interop at all. Occasionally I do something like convert an instant to a java.sql.Timestamp, or I call Math/abs or something, but even these tend to be isolated cases. Its rare that I need deeper interop, unless I'm wrapping a Java library myself (which I haven't needed to do in a long time).

The biggest area where the JVM leaks through is exceptions and error messages.