The JVM lets you program in whatever you want to and then use code written in whatever comfy language (Java, C/C++ via native interop, Kotlin, etc) or a Lisp dialect (Clojure). I frequently use Java and Clojure together in the same project to great satisfaction, but I know what you mean anyways. We need WASM to get around the web question. I just hope it can fulfill the promise you have set upon it.