To be honest, I’ve been thinking about a shell based on the JVM. Especially now with GraalVM, you can have truly polyglot programs running on top of it, with inlinig cross-language boundaries! But of course native code execution should be “bootstrapped” into that world somehow. (Actually, it can use LLVM IR and that as well can run a C function on js objects which is phenomenal, but people do want to run native software from a shell)