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...
OK, but four of the five FAANG companies are betting very heavily on OpenJDK (even Facebook uses it, but not as heavily as the others), which is also owned by Oracle. Oracle has been good to OpenJDK over the decade they've owned it (disclosure: I work on OpenJDK at Oracle).
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)
> 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++.