GraalVM Ruby does not integrate with Java in the same way, and not nearly as seamlessly. JRuby allows implementing Java interfaces in a direct way that optimize

GraalVM Ruby does not integrate with Java in the same way, and not nearly as seamlessly. JRuby allows implementing Java interfaces in a direct way that optimizes better, as well as extending and importing Java classes such that they look and feel like normal Ruby classes. JRuby runs on all JVMs with or without Graal, where the GraalVM languages are tied to that runtime. The design of those languages also incurs heavy startup, warmup, and memory footprint penalties even greater than that of JRuby or the JDK itself, and those problems are not easily solvable. JRuby will never go away, and as long as I have a say in it, development will continue full speed ahead. We are tackling some of our long-desired optimizations now, have near parity on Ruby language features with the unreleased Ruby 3.4, and we're very excited for the future of the project.