The tradeoff is that you get a much more stable runtime, true multithreading, and the ability to play ball with everything in the Java ecosystem. Sure, it take

The tradeoff is that you get a much more stable runtime, true multithreading, and the ability to play ball with everything in the Java ecosystem. Sure, it takes longer to start up, but we're talking a few seconds here, which is nothing for a long-running webapp. Plus, the JVM is rock-solid, has very predictable memory usage, and also has tons of monitoring infrastructure to bring to bear against problems. Yeah, I'm a fan.