For people like me who've never heard of this before:
> GraalVM is a universal virtual machine for running applications written in JavaScript, Python, Ruby, R, JVM-based languages like Java, Scala, Kotlin, Clojure, and LLVM-based languages such as C and C++.
It's worth noting that the project is also owned by Oracle. Regardless of how great GraalVM is, that fact may give some people pause...
also worth noting is that Oracle has completely open sourced the Community Edition and actively developing it https://github.com/oracle/graal (I work at Oracle)