Licensing has changed since that release. You can use the EE for free, both for personal and commercial use cases:

https://www.graalvm.org/latest/introduction/#licensing-and-s...

> Oracle GraalVM is licensed under GraalVM Free Terms and Conditions (GFTC) including License for Early Adopter Versions. Subject to the conditions in the license, including the License for Early Adopter Versions, the GFTC is intended to permit use by any user including commercial and production use.

It has all the sandboxing features you might want. I don't know if the disclaimers on the other engines changes much, open source software always disclaims all liability. Nobody will stand behind something security sensitive unless it's commercial because otherwise there's no way to pay for the security team it requires.