To remove the GIL, you'd need to introduce proper atomicity to all of the standard library, and include concurrency checks for many data structures. And the GIL

To remove the GIL, you'd need to introduce proper atomicity to all of the standard library, and include concurrency checks for many data structures. And the GIL isn't really the enemy, if you are doing cpu intensive work, you'd use the C interface - which happens to not be affected by the GIL in the first place. This also happens to be how to get "more performance". Unfortunately this means you can't switch to pure JIT, because as PyPY have found out, you need to rewrite parts of the standard library that are written in C (like the crypto libraries).