There's a lot of existing tooling around the JVM: debugging, diagnostics, profiling, performance tuning, deployment, security, enterprise-y concerns... It also

There's a lot of existing tooling around the JVM: debugging, diagnostics, profiling, performance tuning, deployment, security, enterprise-y concerns... It also boasts perhaps the most advanced VM implementation of its kind—hard to beat the number of collective person-hours invested in it over its long lifespan.