JVM != Java. I've been using the JVM in production systems for nearly 8 years now without having written a single line of Java code. I am extremely happy with

JVM != Java. I've been using the JVM in production systems for nearly 8 years now without having written a single line of Java code. I am extremely happy with the VM I'm getting for my Clojure code: implementing virtual machines is very difficult, especially ones with good performance. I am quite happy I don't have a single-global-lock problem, that I get modern garbage collection algorithms, and impressive JIT compiler magic. Thanks to the JVM I rarely encounter any performance problems, and when I do, they are easy to solve (don't do stupid things).