They're going to have to spend an immense amount of time implementing all the performance optimizations present in mri/yarv bytecode engine before they achieve

They're going to have to spend an immense amount of time implementing all the performance optimizations present in mri/yarv bytecode engine before they achieve performance parity. The amount of engineering effort to remove the GIL and simultaniously make C extensions work is probably not worth simply choosing a multi-process w/ shared memory solution for true parallelism.