The JVM is one of the most amazing piece of tech ever created. It's so good it supports not only what has been most the popular language in the world for years, but many newly popular languages like Kotlin or Closure. The perf have been optimized so much they are getting about 70% of C/C++, but with high level paradigms. It can pretty much do everything.

In fact, it runs on everything. It used to run on old school nokia phones. It runs on some credit cards! Despite being slowed down by patent trolling, Java found its way to more than half the modern mobile phones in the world throught Dalvik reimplementation.

It's everywhere.

Today, it is still ranking #2 on TIOBE and PYPL, despite having to leave with 2 decades of legacy design decisions and no monopoly.