How much have you used GraalVM? I'm curious to know if it really works like that in practice. I've read what it says on the tin a few times and been impressed, but haven't actually sat down and played with it yet. The skeptic in me thinks that in a real-world production scenario, such a thing is surely a house of cards that falls down all the time in unexpected and difficult to diagnose ways. It'd be great to hear if there's people who can vouch and say it actually delivers on its promises of a polyglot utopia :)